Jack the Ripper and Other Unidentified Killers

1. The mysterious murders on Whitechapel Street

In the foggy London nights of 1888, a serial killer terrorized the impoverished Whitechapel district, leaving a trail of terror that would echo for over a century. Jack the Ripper earned his name from a letter signed "Dear Boss" sent to someone claiming to be the killer, widely circulated by the press at the time. While it's possible this letter was a hoax, written by journalists to boost newspaper sales, the name stuck and became synonymous with Victorian urban terror. Between August and November 1888, five women known as "The Canonical Five" were brutally murdered: Mary Ann Nichols, Annie Chapman, Elizabeth Stride, Catherine Eddowes, and Mary Jane Kelly. All were prostitutes, all were killed with extreme violence, and all had their throats cut before suffering abdominal mutilations that suggested considerable anatomical knowledge.

Fotografia da rua Whitechapel do fim do Séc XIX, em Londres, Inglaterra

What made Jack the Ripper such a prominent figure in criminal history was not only the brutality of his crimes, but the way he mocked the authorities. During the period of the murders, the police received numerous letters supposedly from the killer, but only three are considered potentially authentic: "Dear Boss," which first used the name Jack the Ripper; "Saucy Jacky," which mentioned a "double event" coinciding with two murders on the same night; and the most disturbing, "From Hell," sent with half of a human kidney allegedly removed from one of the victims. A doctor who examined the organ stated that it likely belonged to a woman around 45 years old who suffered from an illness associated with excessive drinking, and Catherine Eddowes, from whose body a kidney had been removed, was 46 years old and an alcoholic. The coincidence was macabre and compelling.

Cartão postal de "Saucy Jacky", uma mensagem recebida pela Central News Agency de Londres em 1º de outubro de 1888, supostamente escrita por Jack, o Estripador.

The investigation into the Jack the Ripper murders was marred by numerous failures of the London police. London was served by two distinct police forces that frequently did not share information, crime scenes were not properly isolated allowing for contamination of evidence, and modern forensic technology such as fingerprinting or DNA analysis was lacking. Furthermore, because they were poor women and prostitutes, the victims did not receive the same attention that others might have. Despite extensive investigations, the killer was never identified, and his true identity will likely never be known for sure. The case was officially closed, but the mystery remains one of the most intriguing in criminal history.

2. When Terror Came Disguised as Code

Decades later, across the Atlantic, another serial killer would leave his mark on history not only for his brutal crimes, but for the unique way he defied authorities. In the late 1960s, Northern California was haunted by a series of brutal crimes: in December 1968, David Arthur Faraday and Betty Lou Jensen were shot to death in a car; in July 1969, Michael Renault Mageau and Darlene Elizabeth Ferrin were similarly attacked, with Michael surviving; and in September of the same year, the couple Bryan Hartnell and Cecelia Shepard were stabbed, with only the man surviving. The Zodiac Killer, as he became known, targeted young couples and a lone taxi driver, and claimed in his letters to have killed approximately 37 people, although only five deaths have been confirmed.

What made the Zodiac particularly disturbing was his need for communication and provocation. He sent cryptic letters and ciphers to newspapers and the police, with messages that provided detailed descriptions of his crimes and demanded their publication. One of these messages, called "cipher 340," remained a mystery for 51 years until December 2020, when a trio of amateur codebreakers—David Oranchak, Jarl Van Eycke, and Sam Blake—finally managed to decode it using specially developed software. The revealed message was disturbing but contained no information about his identity. To this day, despite suspects like Gary Francis Poste being named by investigators in 2021, the Zodiac's official identity remains unknown.

Mensagem codificada enviada pelo notório Assassino do Zodíaco, um serial killer que aterrorizou a Califórnia no final dos anos 1960.

3. A Legacy of Unsolved Mysteries

Jack the Ripper and the Zodiac Killer are just two examples of a terrifying category of criminals: those who were never caught. History is full of similar cases that continue to intrigue investigators and true crime enthusiasts. The Black Dahlia, as Elizabeth Short became known, was found in 1947 with her mutilated and dismembered body in Los Angeles, in one of the most brutal and mysterious cases in the United States, where the killer was never identified. The Axeman of New Orleans terrorized the city between 1911 and 1919, brutally murdering about 12 people with razors or hatchets. Even the famous Tylenol poisoning case in Chicago in 1982, where seven people died after ingesting pills laced with cyanide, was never solved.

Unidentified killers who left their mark on history:

• Jack the Ripper (1888) : Five prostitutes brutally murdered in London; sent gruesome letters to the police.

• Zodiac Killer (1968-1969) : At least five victims in California; sent encrypted codes that baffled experts for decades.

• The Black Dahlia (1947) : Elizabeth Short found dismembered in Los Angeles; a case marked by extreme brutality.

• The Axeman of New Orleans (1911-1919) : Approximately 12 victims; once ordered all bars to play jazz to prevent a massacre.

• Cleveland Trunk Killer (1930s) : Killed and dismembered at least 12 people, removing heads while they were still alive.

• Highway of Tears (1969-2011) : At least 18 women disappeared or were killed on a stretch of road in Canada.

• Lake Bodom Murders (1960) : Three young men brutally murdered in a tent in Finland; case never solved.

Diferentes casos, alguns em circustências peculiares e outros brutais, seguem sem solução.

4. Why Were These Cases Never Solved?

Several factors explain why these crimes remained unsolved. In Jack the Ripper's time, forensic technology was virtually nonexistent—there was no DNA analysis, fingerprinting, or standardized crime photography. Lack of coordination between police forces, contamination of crime scenes, and the devaluation of victims (often poor and marginalized women) hampered investigations. Even with later technological advances, killers like the Zodiac managed to escape through careful planning and intelligence. Time also worked against justice: witnesses died, physical evidence deteriorated, and the criminals themselves may have died without ever being identified.

Reprodução do mandado de busca original do Assassino do Zodíaco, emitido pelo Departamento de Polícia de São Francisco em 18 de outubro de 1969.

5. The Eternal Fascination with the Unknown

More than a century after the crimes of Jack the Ripper, and decades after the Zodiac murders, these cases continue to fascinate the public. They have become part of popular culture, inspiring films, books, documentaries, and series. Tourist tours through the streets of Whitechapel attract thousands of visitors annually, and enthusiasts still try to decipher the Zodiac codes. These killers symbolize more than criminals who escaped justice—they represent the fear of the unknown, the fragility of urban security, and the complexity of the human mind. Their legacy has changed how society views criminal investigation and serves as a reminder that, despite all the advances in modern forensic science, there are still mysteries that may never be fully solved.