Between 1979 and 1983, five young males aged 14 to 25 were abducted, tortured, and killed in and around Adelaide, South Australia. The crimes became known as "The Family Murders," a name derived from a detective's 1988 television reference to breaking up a "happy family" believed responsible for the killings. Police have said as many as 12 people, including some described as high-profile Australians, may have been involved in related kidnappings and sexual assaults of teenage boys and young men, with several suspects reportedly sharing a pattern of seeking out young males for sex, sometimes drugging and raping them.
The five identified victims were Alan Arthur Barnes (16, killed 1979), Neil Fredrick Muir (25, killed 1979), Peter Stogneff (14, killed 1981), Mark Andrew Langley (18, killed 1982), and Richard Dallas Kelvin (15, killed 1983). The victims had been sexually assaulted and tortured, and sedative drugs including Noctec and Mandrax were detected in several victims' bloodstreams; the remains of some victims had been dismembered. Kelvin, the son of Nine Network newsreader Rob Kelvin, was abducted near his North Adelaide home and held captive for about five weeks before his body was found near an airstrip at Kersbrook; trace evidence including hair and fibres from the home of Bevan Spencer von Einem was recovered from his body and clothing.
Von Einem was convicted in 1984 of Kelvin's murder and sentenced to life imprisonment, with a non-parole period later extended to 36 years following an appeal in 1985. In 1989 he was charged with the murders of Barnes and Langley, but the prosecution discontinued the case (entering a nolle prosequi) after the trial judge ruled key similar-fact evidence inadmissible. He was also reportedly one of the last people seen with Muir before Muir's disappearance.
Three other individuals — described in reporting as an Eastern Suburbs businessman, a former male prostitute referred to as "Mr B.," and an Eastern Suburbs doctor — have been identified as suspects believed to have been directly involved, but none has been charged. A cold case review beginning in March 2008 offered a $1 million reward and conditional immunity for information, and included renewed DNA testing of suspects; it concluded in November 2010 without further charges. Von Einem died in prison of natural causes on 5 December 2025, aged 79, without providing further information on the other killings. Rewards of between $200,000 and $1 million remain on offer for information leading to convictions in the unsolved cases.