TRANS-SCRIBE: Eccentric Earth Episode One Show Notes

Welcome to the first in a series of show notes for Eccentric Earth, where I will include the research for each episode (essentially my script), along with a number of photographs and documents.

Episode One - The Vampire of Dusselorf

Peter Kürten was born into a poverty-stricken, abusive family in Mülheim am Rhein, Germany on 26 May 1883, the third of thirteen children. Kürten's parents were both alcoholics who lived in a one-bedroom apartment, and although Kürten's father was an efficient workman who earned sufficient money to provide food, shelter and clothing for his family, the relationship between his parents was marred by the domestic violence Kürten's father would inflict upon both his wife and children, particularly when he was drunk.

When intoxicated, Kürten's father would often force his wife and children to assemble in one room before ordering his wife to strip naked and engage in intercourse with him as his children watched. He would be jailed for 15 months in 1894 for committing incest with his eldest daughter, who was aged 13. Shortly thereafter, Kürten's mother obtained a separation order, and later remarried and relocated to Düsseldorf.

The Kurten family.

In 1888, Kürten attempted to drown one of his playmates. Four years later, he befriended a local dog-catcher who lived in the same building as his family, and began accompanying him on his rounds. This individual would often torture and kill the animals he caught, and Kürten soon became an active and willing participant in torturing the animals himself.

Being the eldest surviving son, Kürten was the target of much of his father's physical abuse. Although he was a good scholar, he would later recollect his academic performance suffered due to the extensive physical violence he endured from his father. He frequently refused to return home from school. From an early age, Kürten frequently ran away from home for periods of time ranging from days to weeks.

Much of the time Kürten spent on the streets was in the company of petty criminals and social misfits. Via these acquaintances, Kürten was introduced to various forms of petty crime, which he would initially commit as a means of feeding and clothing himself when living on the streets.

He later claimed to have committed his first murders at the age of nine, when he pushed a school friend whom he knew was unable to swim off a log raft. When a second boy attempted to save the drowning youngster, Kürten held this boy's head underwater in order that both boys drowned. Both deaths were ruled by authorities as being accidental.

At the age of 13, Kürten formed a relationship with a girl his age who, although happy to allow Kürten to undress and fondle her, would resist any attempts he made to engage in intercourse. In response, Kürten resorted to acts of bestiality with the sheep, pigs and goats in local stables to achieve satisfaction, but later claimed he obtained his greatest sense of elation if he actually stabbed these animals just prior to his achieving orgasm. Thus, he began stabbing and slashing animals with increasing frequency to achieve orgasm, although he was adamant this behaviour ended when he was observed stabbing a pig. He is also known to have attempted to rape the same sister his father had earlier molested.

In 1897 at the age of 14, Kürten left school. At his father's insistence, he obtained employment as an apprentice molder. This apprenticeship would last for two years before Kürten stole all the money he could find in his household, plus approximately 300 marks from his employer, and ran away from home. He relocated to Koblenz, where he began a brief relationship with a prostitute two years his senior whom he claimed willingly submitted to every form of sexual perversion he demanded of her. He was apprehended just four weeks later and charged with both breaking and entering and theft, and subsequently sentenced to one month's imprisonment. He was released from prison in August 1899 and reverted to the life of petty crime he had lived before his arrest.

Kürten claimed to have committed his first murder as an adult in November 1899. Kürten said that he "picked up an 18-year-old girl at the Alleestraße" and persuaded her to accompany him to the Hofgarten, where he claimed to have engaged in sex with the girl before strangling her to death with his bare hands.

No contemporary records exist to corroborate Kürten's claims. If this attack did indeed take place, the victim likely survived this assault. Nonetheless, Kürten would later state that, via his committing this act, he had proven to himself that the greatest heights of sexual ecstasy could only be achieved in this manner.

Shortly thereafter, in 1900, Kürten was arrested for fraud. He would be rearrested later the same year on the same charge, although on this second occasion, charges pertaining to his 1899 Düsseldorf thefts, plus the attempted murder of a girl with a firearm were added to the indictment. Consequently, Kürten was sentenced to four years' imprisonment in October 1900. He served this sentence in the suburb of Derendorf.

German infantry regiment during World War One.

Released in the summer of 1904, Kürten was drafted into the German Army; he was deployed to the Alsatian city of Metz to serve in the 98th Infantry Regiment, although he soon deserted. That autumn, Kürten began committing acts of arson, which he would discreetly watch from a distance as emergency services attempted to extinguish the fires. The majority of these fires were in barns and haylofts, and Kürten would estimate to police he had committed approximately 24 acts of arson upon his arrest that New Year's Eve. He also freely admitted these fires had been committed both for his sexual excitement and in the hopes of burning sleeping tramps alive.

As a result of his desertion, Kürten was tried by the military system and convicted of desertion in addition to multiple counts of arson, robbery and attempted robbery (the latter charges pertaining to acts he had also committed that year), and imprisoned from 1905 to 1913. Kürten served his sentence in Münster, with much of his time spent in solitary confinement for repeated instances of insubordination.

He would later claim to investigators and psychologists this period of incarceration was that in which he first encountered severe forms of discipline, and as such, the erotic fantasies he had earlier developed while incarcerated in Derendorf expanded to include graphic fantasies of his striking out at society and killing masses of people; these fantasies became ever more paramount and overbearing in his mind, and Kürten would later claim that he derived the "sort of pleasures from these visions that other people would get from thinking about a naked woman", adding that he would occasionally spontaneously ejaculate while preoccupied with such thoughts.

Christine Klein, Kurtens first confirmed victim.

The first murder Kürten is confirmed to have committed occurred on 25 May 1913. During the course of a burglary at a tavern in the town of Mülheim am Rhein, he encountered a 9-year-old girl named Christine Klein asleep in her bed. He strangled the child, then slashed her twice across the throat with a pocket knife, ejaculating as he heard the blood dripping from her wounds onto the floor by her bed.

The following day, Kürten specifically returned to Köln to drink in a tavern located directly opposite that in which he had murdered Christine Klein, in order that he could listen to the locals' reactions to the child's murder. He would later recollect to investigators he derived an extreme sense of gratification from the general disgust and outrage he had heard in the patrons' conversations. Moreover, in the weeks following Klein's funeral, he would occasionally travel to Mülheim am Rhein to visit the child's grave, adding that when he handled the soil covering her grave, he would spontaneously ejaculate.

Two months later—again in the course of committing a burglary with the aid of a skeleton key—Kürten broke into a home in Loscheckes. Discovering a 17-year-old girl named Gertrud Franken, Kürten manually strangled the girl, ejaculating at the sight of blood spouting from her mouth. Kürten managed to escape from the scene of both this murder and that of Klein undetected.

Just days after the murder of Gertrud Franken, on 14 July, Kürten was arrested for a series of arson attacks and burglaries. He was sentenced to six years' imprisonment, although his repeated instances of insubordination while imprisoned saw his incarceration extended by a further two years. Kürten served this sentence in a military prison in the town of Brieg.

Released in April 1921, Kürten relocated to Altenburg, where he initially lived with his sister. Through his sister, Kürten became acquainted with a woman three years his senior named Auguste Scharf, a sweet shop proprietor and former prostitute who had previously been convicted of shooting her fiancé to death, and to whom Kürten initially posed as a former prisoner of war.

Two years later, Kürten and Scharf married, and although the couple regularly engaged in sex, Kürten later admitted he could consummate his marriage only by fantasising about committing violence against another individual, and that, after their wedding night, he engaged in intercourse with his wife only at her invitation. For the first time in his life, Kürten obtained regular employment, also becoming an active trades union official, although with the exception of his wife, he formed no close friendships.

In 1925, he returned with his wife to Düsseldorf, where he soon began affairs with a servant girl named Tiede, and a housemaid named Mech. When his wife discovered his infidelity, Tiede reported Kürten to police, claiming he had seduced her; Mech alleged Kürten had raped her. The more serious charge was later dropped, although Tiede's allegations were pursued, thus earning him an eight-month prison sentence for seduction and threatening behaviour. Kürten served six months of this sentence, with his early release being upon the condition he relocated to Düsseldorf.

On 3 February 1929, Kürten stalked an elderly woman named Apollonia Kühn. Waiting until Kühn was shielded from the view of potential witnesses by bushes, Kürten pounced upon her, grabbing her by the lapels of her coat and shouting the words, "No row! Don't scream!" before dragging her into nearby undergrowth, where he proceeded to stab her 24 times with a sharpened pair of scissors. Although many of the wounds he inflicted were so deep they impacted her bones, Kühn survived her injuries.

On 8 February he strangled a nine-year-old girl named Rosa Ohliger into unconsciousness, before stabbing her in the stomach, temple, genitals and heart with a pair of scissors, spontaneously ejaculating as he knifed the child and inserting his semen into her vagina with his fingers. He then made a rudimentary effort to hide Ohliger's body by dragging it beneath a hedge, before returning to the scene with a bottle of kerosene several hours later and setting the child's body alight, achieving an orgasm at the sight of the flames. Ohliger's body was found beneath a hedge the following day.

On 13 February, he murdered a 45-year-old mechanic named Rudolf Scheer in the suburb of Flingen Nord, stabbing him 20 times, particularly about the head, back and eyes. Following the discovery of Scheer's body, Kürten returned to the scene of the murder to converse with police, falsely informing one detective he had heard about the murder via telephone.

Despite the differences in age and sex of these three victims, the fact that all three crimes had been committed in the Flingern district of Düsseldorf at dusk, that each victim had received a multitude of stab wounds likely inflicted in rapid succession and invariably involving at least one wound to the temple, plus the absence of a common motive such as robbery, led investigators to conclude the same perpetrator had committed all three attacks. Furthermore, the seemingly random selection of these victims led criminologists to remark as to the abnormal nature of the perpetrator.

Although Kürten did attempt to strangle four women between March and July 1929, one of whom he claimed to have thrown into the Rhine River, he is not known to have killed any further victims until 11 August when he raped, strangled, then repeatedly stabbed a young woman named Maria Hahn.

Maria Hahn, killed by Kurten on 11 August.

Kürten had first encountered Hahn on 8 August, and had arranged to take her on a date the following Sunday. After several hours in Hahn's company, Kürten lured her into a meadow in order that he could kill her; he later admitted Hahn had repeatedly pleaded with him to spare her life as he alternately strangled her, stabbed her in the chest and head, or sat astride her body, waiting for her to die. Hahn died approximately one hour after Kürten had begun attacking her.

Fearful his wife might connect the bloodstains she had noted on his clothes with Hahn's murder, Kürten later buried her body in a cornfield, only to return to her body several weeks later with the intention of nailing her decomposing remains to a tree in a mock crucifixion to shock and disgust the public; however, Hahn's remains proved too heavy for Kürten to complete this act, and he simply returned her corpse to her grave before embracing and caressing the decomposing body as he lay beneath her remains.

He then reburied Hahn's body. According to Kürten's later confession, both before and after he had attempted to impale Hahn's corpse to a tree, he "went to the grave many times and kept improving on it; and every time I thought of what was lying there and was filled with satisfaction."

Three months after Kürten had murdered Maria Hahn, he posted an anonymous letter to the police in which he confessed to Hahn's murder, adding that her remains had been buried in a field. In this letter, Kürten also drew a crude map describing the location of her remains. This letter would prove sufficiently detailed to enable investigators to locate Hahn's remains on 15 November.

Letter sent to the police by Kurten, detailing Hahns location.

Following the murder of Maria Hahn, Kürten changed his choice of weapon from scissors to a knife in an apparent effort to convince police more than one perpetrator was responsible for the spate of assaults and murders. In the early morning of 21 August, Kürten randomly stabbed an 18-year-old girl, a 30-year-old man, and a 37-year-old woman in separate attacks. All three were seriously wounded, and all would state to police their assailant had not spoken a word to them before he had attacked them.

Three days later, at a fairground he observed two foster sisters (aged five and 14) walking from the fairground, through adjoining allotments, en route to their home. Sending the older girl, Luise Lenzen, on an errand to purchase cigarettes for him upon the promise of being given money in return for the favour, Kürten lifted the younger child, Gertrude Hamacher, off the ground by her neck and strangled her into unconsciousness before cutting her throat and discarding her body in a patch of runner beans.

When Lenzen returned to the scene, Kürten partially strangled her before stabbing her about the torso, with one wound piercing her aorta. He also bit and twice cut her throat before sucking blood from the wounds. Neither girl had been sexually assaulted.

The following day, Kürten accosted a 27-year-old housemaid named Gertrude Schulte, whom he openly asked to engage in sex with him. Upon being rebuffed, Kürten shouted, "Well, die then!" before repeatedly stabbing the woman in the head, neck, shoulder, and back. Schulte survived her injuries, although she was unable to provide investigators with a clear description of her assailant, beyond assuming his age to be around 40.

Kürten attempted to murder two further victims—one by strangulation; another by stabbing—in September, before opting to predominantly use a hammer in his murders.

On the evening of 30 September, Kürten encountered a 31-year-old servant girl named Ida Reuter at Düsseldorf station. He successfully persuaded Reuter to accompany him to a café, then for a walk through the local Hofgarten close to the Rhine River. At this location, he repeatedly struck her about the head with a hammer both before and after he had raped her. At one stage in this assault, Reuter regained consciousness and began pleading with Kürten to spare her life. In response, Kürten simply "gave her other hammer blows on the head, and misused her".

11 days later, on 11 October, he encountered a 22-year-old servant girl named Elizabeth Dörrier outside a theatre. As had been the case with Reuter, Dörrier agreed to accompany Kürten for a drink at a café before the pair took a train to Grafenberg, with view to a walk alongside the Kleine Düssel river, where she was struck once across her right temple with a hammer, then raped, Kürten struck her repeatedly about the head and both temples with his hammer and left her for dead.

Dörrier was found at 6:30 a.m the following morning, although she would die from her injuries the following day, without awakening from the coma in which she was discovered. On 25 October, Kürten attacked two women with a hammer; both survived, although in the second instance, this was only because Kürten's hammer broke in the attack.

On 7 November 1929, Kürten encountered a five-year-old girl named Gertrude Albermann in the Flingern district of Düsseldorf; he persuaded the child to accompany him to a section of deserted allotments, where he seized her by the throat and strangled her, stabbing her once in the left temple with a pair of scissors as he did so. Kürten stabbed the child 34 further times in the temple and chest, before leaving her body in a pile of nettles against a factory wall.

By the late summer of 1929, the murders committed by the individual the press had dubbed The Vampire of Düsseldorf were receiving considerable national and international attention. Due to the sheer savagery of the murders, the diverse background of the victims, and the differing methods in which they had been assaulted and/or murdered, both the police and the press theorized the spate of assaults and murders were the work of more than one perpetrator.

Newspaper illustration depicting the killer.

By the end of 1929, Düsseldorf police had received more than 13,000 letters from the public. With assistance from surrounding police forces, each lead was painstakingly pursued. As a result of this collective investigation into the killings, more than 9,000 individuals would be interviewed, 2,650 other clues painstakingly pursued and a list of 900,000 different names would be compiled upon an official potential suspect list.

Two days after the murder of Gertrude Albermann, a local Communist newspaper received a map revealing the location of the grave of Maria Hahn. In this drawing, Kürten also revealed precisely where he had left Albermann's body (which had been found earlier that day), describing the exact position of her corpse, which he stated could be found face-down among bricks and rubble.

An analysis of the handwriting revealed the author was the same individual who had anonymously informed police in a letter dated 14 October that he had killed Hahn and buried her body "at the edge of the woods". Each letter Kürten had thus far sent to newspapers and police describing his exploits and threatening further assaults and murders was examined by a graphologist, who confirmed the same individual had written each letter, thus leading the Chief Inspector of the Berlin Police, Ernst Gennat, to conclude that one man was responsible for most or all of the spate of assaults and murders.

The murder of Gertrude Albermann would prove to be Kürten's final fatal attack, although he did engage in a spate of non-fatal hammer attacks and attempted strangulations between February and May 1930, maiming 10 victims in these assaults. All recipients survived and many were able to describe their attacker to police.

On 14 May 1930, an unknown man approached a 20-year-old woman named Maria Budlick at Düsseldorf station. Discovering Budlick had travelled to Düsseldorf from Köln in search of lodgings and employment, this individual offered to direct her towards a local hostel. Budlick agreed to follow this individual, although she became apprehensive when this man attempted to lead her through a scarcely populated park. The pair began to argue, whereupon another man approached the duo, asking whether Budlick was being pestered by her companion. When Budlick nodded, the individual with whom she had been arguing simply walked away. The man who came to her aid was Peter Kürten.

Kürten invited the distressed young woman to his apartment on Mettmanner Straße to eat and drink before Budlick—correctly deducing the underlying motive for Kürten's hospitality—stated she was uninterested in engaging in sex with him. Kürten calmly agreed and offered to lead Budlick to a hotel, although he instead lured her into the Grafenburg Woods, where he seized her by the throat and attempted to strangle her as he raped her. When Budlick began to scream, Kürten released his grasp on her throat, before allowing her to leave.

Budlick did not report this assault to police, but described her ordeal in a letter to a friend, although she addressed the letter incorrectly. As such, the letter was opened at the post office by a clerk on 19 May. Upon reading the contents of the letter, this clerk forwarded the letter to the Düsseldorf police. This letter was read by Chief Inspector Gennat, who deduced there was a slim chance Budlick's assailant might be the Düsseldorf murderer.

Chief Inspector Ernst Gennat interviewed Budlick personally.

Chief Inspector Gennat interviewed Budlick, who recounted her ordeal, further divulging one of the reasons Kürten had spared her was because she had falsely informed him she could not remember his address. She agreed to lead the police to Kürten's home. When the landlady of the property let Budlick into the house, Budlick confirmed to Chief Inspector Gennat this was the address of her assailant. The landlady confirmed to the chief inspector the tenant's name was Peter Kürten.

Although Kürten was not at home when Budlick and Chief Inspector Gennat searched his property, he spotted the pair in the communal hallway, and promptly left the property. Knowing that his identity was now known to the police and suspecting they may also have connected him to the crimes committed by The Vampire of Düsseldorf, Kürten confessed to his wife he had raped Budlick and that because of his previous convictions, he may receive 15 years' penal labour. With his wife's consent, he found lodgings elsewhere, and did not return to his own home until 23 May.

Upon returning home, Kürten confessed to his wife he was The Vampire of Düsseldorf. Hurged his wife to collect the substantial reward offered for his capture, Auguste Kürten contacted the police the following day. In the information provided to detectives, Kürten's wife explained that although she had known her husband had been repeatedly imprisoned in the past, she was unaware of his culpability in any murders. She then added that her husband had confessed to her his crimes as The Vampire of Düsseldorf, and that he was willing to likewise confess to police. Furthermore, he was to meet her outside St. Rochus church later that day. That afternoon, Kürten was arrested at gunpoint.

Kürten freely admitted his guilt in all the crimes police had attributed to The Vampire of Düsseldorf, and further confessed he had committed the unsolved murders of Christine Klein and Gertrud Franken in 1913. In total, Kürten admitted to 68 crimes including 10 murders and 31 attempted murders.

Peter Kurten's mugshot following his arrest.

He made no attempt to excuse his crimes, but justified them upon the basis of what he saw as the injustices he had endured throughout his life. Nonetheless, he was adamant he had not tortured any of his child victims. Kürten also admitted to both investigators and psychiatrists that the actual sight of his victim's blood was, on many occasions, sufficient to bring him to orgasm, and that, on occasion, if he experienced ejaculation in the act of strangling a woman, he would immediately become apologetic to his victim, proclaiming, "That's what love is all about".

He further claimed to have drunk the blood from the throat of one victim, from the temple of another, and to have licked the blood from a third victim's hands. In one of these instances, he had drunk so much blood from the neck wound he had inflicted upon victim Maria Hahn that he vomited. Kürten also admitted to having decapitated a swan in the spring of 1930 in order that he could drink the blood from the animal's neck, achieving ejaculation in the process.

On 13 April 1931, Peter Kürten stood trial in Düsseldorf. He was charged with nine counts of murder and seven of attempted murder, and was tried before Presiding Judge Dr. Rose. Kürten pleaded not guilty by reason of insanity to each of the charges. Aside from when delivering testimony, Kürten would spend the duration of his trial surrounded by a heavily guarded shoulder-high iron cage specifically constructed to protect him from attack by the enraged relatives of his victims, and his feet would be shackled whenever he was inside this cage.

Proceedings began with the prosecution formally reciting each of the charges against Kürten, before they recited the formal confession he had provided to police following his arrest. When then asked by the presiding judge to describe why he had continued to commit acts of arson throughout 1929 and 1930, Kürten elaborated: "When my desire for injuring people awoke, the love of setting fire to things awoke as well. The sight of the flames excited me, but above all, it was the excitement of the attempts to extinguish the fire and the agitation of those who saw their property being destroyed."

Having first claimed that his initial confession had been delivered to simply allow his wife to recoup the reward money offered for the Düsseldorf Vampire's capture, several days into his trial, Kürten instructed his defence attorney that he wished to change his plea to one of guilty. Addressing the court, Kürten proclaimed: "I have no remorse. As to whether recollection of my deeds makes me feel ashamed, I will tell you [that] thinking back to all the details is not at all unpleasant. I rather enjoy it."

Further pressed as to whether he considered himself to possess a conscience, Kürten stated he did not. Nonetheless, when pressed as to his motivation in confessing, Kürten reiterated: "Why don't you understand that I am fond of my wife, and that I am still fond of her? I have done many wrongs; have been unfaithful over and over again. My wife has never done any wrong. Even when she heard of the many prison sentences I have served, she said: 'I won't let you down, otherwise you'll be lost altogether.' I wanted to fix for my wife a carefree old age."

To counteract Kürten's insanity defence, the prosecution introduced five of the most eminent doctors and psychiatrists in Germany to testify at the trial; each testified that Kürten was legally sane and had been perfectly in control of his actions and impulses at all times. Typical of the testimony delivered by these experts was that of Professor Franz Sioli, who testified as to Kürten's actual motivation in his crimes being the desire to achieve the sexual gratification he demanded, and that this satisfaction could only be achieved by acts of brutality, violence and Kürten's knowledge of the pain and misery his actions would cause to others.

Dr. Karl Berg would testify that Kürten's motive in committing murder and attempted murder was 90 percent sadism, and 10 percent revenge relating to his perceived sense of injustice for both the neglect and abuse he had endured both as a child and the discipline he endured while incarcerated. Moreover, Dr. Berg stated that despite Kürten's admission to having embraced and digitally penetrated the corpse of Maria Hahn, and to have spontaneously ejaculated while holding the soil covering the coffin of Christine Klein, his conclusion was that Kürten was not a necrophiliac.

Further proof of Kürten's awareness was referenced by the premeditated nature of his crimes; his ability to abandon an attack if he sensed a risk of being disturbed; and his acute memory of both his crimes and their chronological detail. Also disclosed in the first week of the trial were the deaths of the two boys whom Kürten had confessed to drowning at the age of nine, with the prosecution suggesting these deaths indicated Kürten had displayed a homicidal propensity dating much earlier than 1913. However, this view was disputed by medical witnesses, who suggested that although indicative of an inherent depravity, these two deaths should not be compared to Kürten's later murders as to a child, the death of a friend can be seen as nothing more than an inconsequential passing.

Kurten on trial beside his defence lawyer, Dr. Alex Wehner.

Upon cross-examination, Kürten's defence attorney, Dr. Alex Wehner, did challenge these experts' conclusions, arguing the sheer range of perversions his client had engaged in was tantamount to insanity, although each doctor and psychiatrists remained adamant as to Kürten being legally sane and responsible for his actions.

In a further attempt to discredit the validity of many of the charges recited at the opening stages of the trial, Wehner also questioned whether the occasional physical inaccuracies of the crimes described in his client's confession equated to Kürten having fabricated at least some of the crimes, thus supporting his contention Kürten possessed a diseased mind. In response, one of these experts, Dr. Karl Berg, conceded that sections of Kürten's confession were false, but argued that the knowledge he possessed of the murder scenes and the wounds inflicted upon the victims left him in no doubt as to his guilt, and that the minor embellishments in his confessions could be attributed to Kürten's narcissistic personality.

The trial lasted 10 days. On 22 April, the jury retired to consider their verdict. They would deliberate for less than two hours before reaching their verdict: Kürten was found guilty and sentenced to death on nine counts of murder. He was also found guilty of seven counts of attempted murder. Kürten displayed no emotion as the sentence was passed, although in his final address to the court, he did state that he now saw his crimes as being "so ghastly that [he did] not want to make any sort of excuse for them".

Kürten did not lodge an appeal his conviction, although he did submit a petition for pardon to the Minister of Justice, who was known to be an opponent of capital punishment; this petition was formally rejected on 1 July. Kürten remained composed upon receipt of this news, and asked for permission to see his Confessor, to write letters of apology to the relatives of his victims, and a final farewell letter to his wife. All requests were granted.

As Kürten awaited his trial, then later as he awaited his execution, he was extensively interviewed by Dr. Karl Berg. In these interviews, Kürten stated to Dr. Berg that his primary motive in committing any form of criminal activity was one of sexual pleasure, and that he had begun to associate sexual excitement with violent acts and the sight of blood via indulging in both day-dreams and masturbation fantasies — particularly when he had been isolated from human contact.

The majority of his assaults and murders had been committed when his wife had been working evenings, and the number of stab or bludgeoning wounds Kürten inflicted upon each victim had varied depending upon the length of time it had taken him to achieve an orgasm. Furthermore, the actual sight of his victim's blood had been integral to his sexual stimulation. Kürten further elaborated to Dr. Berg that once he had committed an attack or murder, the feeling of tension he experienced prior to the commission of the crime would be superseded by one of relief.

In reference to the actual choice of weapon used in his attacks, Kurten stressed that although he had changed his actual method of attack to deceive investigators into believing they were seeking more than one perpetrator, the weapon he used was inconsequential in reference to his ultimate objective of seeing his victim's blood. Elaborating, Kurten stated: "Whether I took a knife or a pair of scissors or a hammer in order to see blood was a matter of indifference to me or mere chance. Often after the hammer blows the bleeding victims moved and struggled, just as they did when they were throttled." Kurten further confided that although he had occasionally penetrated his female victims, he had only done so to feign the act of coitus as a motive for his crimes. He also confessed that many of his later strangulation victims had only survived his attacks because he had achieved an orgasm in the early throes of the assault.

Berg would go on to use his interviews with
Kurten to publish his book, 'The Sadist'.

However, Kürten would contradict these claims by proclaiming to both Dr. Berg and legal examiners that his primary motive in all his criminal activities was to both "strike back at[an oppressive society" for what he considered the injustice of his being repeatedly incarcerated throughout his life, and as a form of revenge for the neglect and abuse he had endured as a child. These desires had fermented in his mind throughout the long periods he had been confined in solitary confinement for various forms of insubordination, and Kürten explained that he would deliberately break minor prison rules as a means of guaranteeing that he would be sentenced to solitary confinement in order that he could indulge in these psychosexual fantasies.

To Dr. Berg and the legal examiners, Kürten did not deny that he had sexually molested his female victims, or to have stroked or digitally penetrated their genitals as he stabbed, slashed, strangled or bludgeoned their bodies, although throughout his trial Kürten consistently claimed the sexual assault of his victims was not his primary motive.

On the evening of 1 July 1931, Kürten received his last meal. He ordered Wiener Schnitzel, a bottle of white wine, and fried potatoes. Kürten devoured the entire meal before requesting a second helping. Prison staff decided to grant his request.

At 6 o'clock on the morning of 2 July Peter Kürten was beheaded by guillotine in the grounds of Klingelputz Prison, Cologne. He walked unassisted to the guillotine, flanked by the prison psychiatrist and a priest.

Shortly before his head was placed on the guillotine, Kürten turned to the psychiatrist and asked the question: "Tell me... after my head is chopped off, will I still be able to hear, at least for a moment, the sound of my own blood gushing from the stump of my neck? That would be the pleasure to end all pleasures." When asked whether he had any last words to say, Kürten simply smiled and replied, "No."

Following Kürten's 1931 execution, his head was dissected and mummified; the brain was removed and subjected to forensic analysis in an attempt to explain his personality and behaviour. The examinations of Kürten's brain revealed no abnormalities.

The autopsy conducted upon Kürten's body revealed that, aside from his having an enlarged thymus gland, Kürten had not been suffering any physical abnormality.

The interviews Kürten granted to Dr. Karl Berg in 1930 and 1931 would prove to be the first psychological study conducted upon a sexual serial killer. These interviews would also form the basis of Berg's book, The Sadist.

Shortly after the Second World War, Kürten's head was transported to the United States. It is currently on display at the Ripley's Believe It or Not! museum in Wisconsin Dells, Wisconsin.