Nurse Charles Cullen says he hated to see people suffer but he became the most prolific serial killer in New Jersey history.

A rising pop star, Selena Quintanilla, is gunned down by her fan-turned-manager, Yolanda Saldivar. What led to this tragic betrayal?

A shocking double murder plot revealed after decades turns out to be a tale of sex, religion and greed, that deeply affected the Irish community.