John Gotti
John Gotti was an American mob boss and criminal who served as the head of the Gambino crime family from 1985 until his incarceration in 1996
John Haigh
John Haigh, known as the "Acid Bath Murderer," was a British serial killer who murdered victims and disposed of their bodies using sulfuric acid in the 1940s. He targeted wealthy individuals and used fraud to gain access to their assets. Haigh was eventually arrested and convicted after investigators uncovered evidence of his crimes. He was executed in 1949, and his case remains one of the most infamous murder cases in British history.
John Jonchuck
John Jonchuck is the man who threw his daughter Phoebe, aged five, from a bridge in Tampa Bay, Florida, leading to her tragic death.
John Linley Frazier
John Linley Frazier is the perpetrator responsible for a series of murders committed in the 1980s and early 1990s, also known as the 'Hillsborough Ripper'.

John Villarreal
John Asher Farrell Villarreal became known in American criminal history after the murders of a Texas couple who stopped to help him while he was hitchhiking on Christmas Eve in 2014. Prosecutors alleged Villarreal repaid the victims' kindness with extreme violence, killing both occupants before stealing their vehicle and attempting to evade capture. The case attracted significant attention because of the apparent randomness of the attack and the betrayal involved. Investigators argued the victims had no prior connection to Villarreal and had simply offered assistance to a stranger. The murders shocked the local community and became a tragic example of a good Samaritan encounter ending in deadly violence.

John Wayne Gacy
John Wayne Gacy was an American serial killer and sex offender who murdered multiple victims in Illinois during the 1970s. He became widely known for maintaining a public image as a community figure while committing crimes in secret. Gacy’s case gained notoriety due to the scale of his offences and the contrast between his outward persona and his actions. He was later convicted and sentenced to death, becoming one of the most infamous serial killers in U.S. history.
Johnny Lewis
Johnny Lewis, a former actor on the TV show 'Sons of Anarchy', was convicted for murder after brutally killing an elderly woman and her cat in 2012.