When a psychology student vanishes, her sister believes that her brother-in-law is responsible.

Women are attacked on the streets of Ocala, Fla.; a woman doubts her husband.

A sister suspects her troubled brother when women go missing in Edmonton.

Police hunt for a twisted serial killer when young women go missing in the Midwest.

A motel owner met a doctor involved in a government project online; when his wife went missing, she became suspicious.

A son supports his father through a cancer treatment only to learn of the man's double life.