David Copeland
David Copeland is the convicted London Nail Bomber who carried out a series of attacks in London from March to April 1999, causing multiple casualties.
David Heiss
David Heiss is a murderer who was the subject of World's Most Evil Killers in Season 3, Episode 15.

David Kinney
David Carl Kinney became known in true crime and financial crime reporting after being convicted of murdering his longtime friend Brad McGarry in a case prosecutors described as motivated by greed, deception, and financial manipulation. Investigators alleged Kinney killed McGarry to gain control over money, property, and personal assets while attempting to conceal the crime through elaborate fraud and identity-related schemes. The case attracted widespread attention because of the calculated nature of the killing and the extensive efforts allegedly used to cover up McGarry’s disappearance after the murder. Prosecutors argued Kinney continued exploiting the victim’s identity, finances, and personal accounts after the killing, turning the case into both a homicide investigation and a major fraud prosecution. The combination of betrayal, financial exploitation, and post-murder deception made the case particularly disturbing to investigators and the public.
David Leonard Wood
David Leonard Wood is identified as a serial killer, also known as The Desert Killer

David Parker Ray
David Parker Ray became one of the most infamous serial offenders in American history after constructing a soundproof torture chamber inside a trailer on his property in Truth or Consequences, New Mexico. Known as the "Toy-Box Killer," Ray was convicted of kidnapping, torture, and sexual offences against multiple women. Although investigators suspected he murdered numerous victims over several decades, no homicide convictions were ever secured because no bodies were recovered. His crimes remain among the most disturbing criminal investigations in modern American history.