A syringe filled with yellow-brown liquid is found at the scene of a crime, but what exactly is it?

Police find a syringe in Gareth Pursehouse's home that is identical to the one found at the scene of Amie Harwick's death.

Friends reflect on Amie Harwick's early life and her drive to leave Pennsylvania to pursue "big things." ...

What is the new Dateline true crime podcast Man in the Black Mask? Learn more about it and find out how to listen.

Liz Golyar's plan to kill Cari Farver involved using digital technology to impersonate her for three years. Find out more ...

Joyce Pelzer killed her ex-girlfriend, Shawndell McLeod, with the help of her new lover. Then, she tried to kill her new wife. Learn what happened in the murder.

In 1987, Louis Craine confessed to killing four women. Find out more about the shocking murders in Serial Killer Capital: Los ...

Learn more about the investigation into a series of murders and the arrest of Michael Hughes, as told in Oxygen's Serial Killer Capital: Los Angeles.

Find out more about serial killer Chester Turner, who is serving a life sentence for the murders of 14 women, as told in ...

A Georgia woman who is brutally stabbed provides police with a suspect's name before succumbing to her injuries. As the manhunt for the killer begins, a pattern of toxicity will expose a violent past ...

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Find out how Atlanta civic leader Barney Simms, 70 when fatally shot in his front yard, knew his teen killer Eric Banks, and ...