Unknown Mental Profile Killers

Brian Frederick Jennings was an American man convicted of the 1979 murder of a child in Florida. The case remained significant due to the nature of the crime and the long legal process that followed. Jennings was eventually executed decades later, with the case drawing attention to the length of time inmates can spend on death row before execution.

Brian Whitelock is a notorious serial killer whose crimes are covered in the 2025 documentary.

Bruce Embry is identified as a remorseless killer in the title.

Bruce Jeffrey Pardo was an American mass murderer responsible for the 2008 Covina Christmas Eve massacre in California. Disguised as Santa Claus, he carried out a deadly attack on his former in-laws’ home. After killing multiple victims, Pardo fled and later died by suicide. The case shocked the public due to its timing and the calculated nature of the attack.

Bruce Reynolds is known as the mastermind behind the Great Train Robbery of 1963 in Britain

Caleb Sharpe is the perpetrator of a school shooting in 2025.