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Diane Downs, Martha Wise, and teenage killers Valerie Parashumti and Jessica Stasinowsky committed fatal crimes involving family murders and poisoning. Their actions led to multiple deaths, including teenage victim Stacy Mitchell, highlighting complex motives and tragic outcomes.

Martin Bryant: The Port Arthur Massacre explores the life of Martin Bryant, examining his troubled childhood, personal tragedies, and the path that led to the Port Arthur massacre. The documentary traces the events of Australia's deadliest mass shooting while examining the devastating consequences for victims, survivors, and the nation as...

Previously unseen police interrogation footage reveals chilling new insight into Port Arthur mass killer Martin Bryant and Australia’s deadliest massacre. Decades after the 1996 attack that killed 35 people in Tasmania, investigators, legal experts and those closest to Bryant revisited the case to examine the mindset, behavior and disturbing psychology...

A Las Vegas teenager, inspired by Martin Scorsese's film, formed a meth-dealing gang and fatally shot his best friend during a confrontation. The crime, rooted in his obsession with crime fiction, led to his arrest and highlighted the dangers of real-life imitation of cinematic violence.

Marvin Gay Sr. murdered his son, Marvin Gay Jr., after decades of hatred, despite the latter's success as a singer. The case highlights familial violence driven by deep-seated resentment, culminating in his son's murder.

Mary Ann Cotton, a 19th-century serial killer, was convicted of one murder but later suspected of poisoning 21 victims, including ex-husbands and her children. Her crimes highlight a cold, calculated approach to murder.

Nineteenth-century serial killer Mary Ann Cotton, known as the Black Widow, murdered men in northeast England for their life insurance, traveling across the region to commit the crimes.

Bob Samuels, a Hollywood cameraman, and his wife Mary Ellen, dubbed the "Green Widow," were central to a tragic case involving secrets and betrayal. Their story highlights the complexities of ambition and personal conflict leading to a fatal outcome.

Mary Gough was found dead at the foot of a staircase in her home, shared with her husband Colin Whelan. The case involves an investigation into the circumstances surrounding her apparent fatal fall, with authorities examining potential foul play.

Deputies in Florida arrested Jalen Vallejos near his ex-girlfriend’s home after he was found wearing a ski mask and allegedly stated his intent to watch her sleep through her bedroom window. A sledgehammer was discovered in his vehicle, leading to charges of aggravated stalking, attempted armed burglary, and possession of burglary tools.

Detective Sergeant Mick Randall investigated a surge of nighttime burglaries in Wimbledon, with 50 incidents weekly and no forensic evidence. A prisoner's tip revealed hidden escape routes used by offenders, including "creepers" and a masked "ninja," allowing them to evade detection by avoiding main roads.

In 1984, a serial predator targeted suburban residents in Britain, assaulting victims aged 17 to 74. The police investigation, occurring before DNA evidence became standard, led to the capture of the offender, marking a pivotal case in criminal justice history.