Imprisoned Killers

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.

David Tronnes became one of Florida's most notorious domestic killers after murdering his wife, Shanti Cooper-Tronnes, inside their Orlando home in 2018. Prosecutors alleged Tronnes killed Shanti after their marriage deteriorated amid financial disputes and his obsession with renovating their home for profit. He then attempted to disguise the homicide as an accidental fall during construction work. Following a lengthy investigation and trial, Tronnes was convicted of first-degree murder and sentenced to life imprisonment without parole.

Dennis Andrew Nilsen became one of the United Kingdom's most infamous serial killers after murdering at least 15 young men and boys in London between 1978 and 1983. Often referred to as the "Muswell Hill Murderer," Nilsen lured vulnerable victims to his home before strangling them and keeping their bodies for extended periods. His crimes were uncovered only after human remains blocked drains at his apartment building, leading to one of Britain's most shocking homicide investigations.

Dennis Rader, known as the BTK Killer (Bind, Torture, Kill), is an American serial killer who murdered ten victims in Kansas between 1974 and 1991. He targeted individuals in their homes, carrying out controlled and methodical attacks. Rader evaded capture for decades while maintaining a normal public life. His case gained notoriety due to his communication with media and law enforcement, and his eventual capture in 2005 following a forensic breakthrough.

Derek Joseph Daigneault murdered his 26-year-old cousin, Mandy Rose Reynolds, in Texas in April 2023 after staying at her San Marcos apartment while on felony probation with an active warrant. Daigneault shot Reynolds in the head, placed her body inside a large plastic storage container, transported it to Robinson and set it on fire. Her body was initially burned beyond recognition, but her dog Titan remained at the scene, and his microchip helped investigators identify Reynolds. Daigneault was arrested in Kansas after fleeing from police in Reynolds' stolen car and was convicted of murder in November 2024. He was sentenced to life imprisonment, and his conviction and sentence were affirmed by the Texas Tenth Court of Appeals in April 2026.

Dillon Alexander Waller is an American man convicted of the 2022 murder of his mother in New Mexico. The crime occurred within a domestic setting and involved attempts to conceal the offence. He was later convicted of first-degree murder and sentenced to life imprisonment.

Donald McMillan Jr. murdered 62-year-old Helen Fiona Torbet in the Scottish Highlands in July 1993 after developing an obsession with her during her regular stays at his parents' guesthouse near Inverinate. After killing Torbet, McMillan concealed her body in the grounds of the property and maintained for months that she had left with another man. A lengthy missing-person investigation eventually focused on McMillan, who directed police to the burial site. He was convicted of murder in 1994 and sentenced to life imprisonment, later receiving a 15-year punishment part. McMillan remained imprisoned until his death in 2007.

Dr. Robert Bierenbaum became one of New York’s most infamous domestic killers after being convicted in the murder of his wife, Gail Katz, in a case widely known as “The Private Pilot Wife Disappearance.” A respected plastic surgeon and licensed private pilot, Bierenbaum was accused of killing Gail in 1985 before disposing of her body in a manner prosecutors argued exploited his aviation knowledge and access to aircraft. The case generated enormous public attention because Gail Katz vanished without a trace, leaving investigators with no body and little physical evidence for years. Prosecutors later argued Bierenbaum murdered his wife during escalating marital conflict before flying her body out over the Atlantic Ocean and disposing of it from a private aircraft. The combination of professional status, aviation-related body disposal allegations, and decades-long mystery made the case one of the most heavily discussed no-body homicide prosecutions in New York criminal history.