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.

Amish men are rarely prosecuted and jailed for sexual abuse against children. What's being done to expose these crimes?

We speak with Deborah Marion, mother of murdered NBA star Lorenzen Wright and Darren Goods, a lead investigator in Wright's homicide case.

The murder of a Chinese woman by her American husband in Columbia, Missouri was a long and painful case for police investigators, attorneys and, most of all, her parents.

An Airman who grew up in a Mennonite family came to resent the faith so much, he murdered a young Mennonite woman.

In October 2003, eight-year-old Josef Smith was beaten to death by his parents, Joseph and Sonya Smith. The Smiths were members of a church that promotes disciplining children in a way that some have said is abusive.

In 2010, Lawrence Ray, a 50-year-old ex-con, formed a sex cult at his daughter's dorm room at Sarah Lawrence College in New York and humiliated, tortured and trafficked members for his pleasure and monetary gain.