After 6-year-old William DaShawn Hamilton was found murdered in Georgia in 1999, it took 23 years to identify him and solve the case. We speak with those who never forgot about the case and pushed for justice.

We speak with experts about how conditions, like environment and temperature, affect forensic evidence when a body goes undiscovered for long periods of time.

In 2022, the cold case murder of a Black teenage girl in Atlanta, Nacole Smith, and the sexual assault of another Black teen, were solved using forensic genetic genealogy. The assailant was the same man in both cases: Kevin Arnold.

Newlywed Lisa Techel, 23, was pregnant and asleep in bed in her Iowa home, when she was shot to death by her husband, Seth, in May 2012.

A romance author writes about how to murder a husband—and then kills her spouse. It might sound like the plot of a novel, but it happened in Oregon in 2018.

Detective John Dawes speaks with us about the difference between solving active and cold cases.

Psychological autopsies, performed by forensic psychologists, are used to try to resolve cases where a murder may be mistaken for a suicide.

After Diane Staudte's husband and son died, and her daughter was hospitalized, an investigation showed she, and her favorite daughter, Rachel, were responsible for their deaths.

The reign of the bodybuilding world's most famous couple, Sally and Ray McNeil, ended after Sally murdered Ray with a shotgun in 1995.

From German nurse Niels Högel to U.K. doctor Harold Shipman to American nurse Charles Cullen, some serial killers target their patients.