Brooke Wilberger had her life in front of her when she vanished from the apartment complex where she was working during the summer of 2004, leaving her anguished family desperately searching for answers.
Between 1978 and 1995, Ted Kaczynski killed three people and injured 23 more in a nationwide bombing campaign that targeted people involved with modern technology.
As an openly gay man working in an Ohio coal mine, Brad McGarry may have rubbed his more conservative coworkers the wrong way, but was his homicide a hate crime or was the surprising killer closer to home?
Makeva Jenkins' dreams were finally coming true when the successful entrepreneur and mom was shot to death in her Florida home in a bizarre home invasion.
"I put my family first," Josh Powell insisted in a final eerie interview with Dateline: Secrets Uncovered before investigators say he killed his two young sons during a court-ordered visitation.
Manny Cortez was convicted of killing two 11-year-old friends, but recordings of his sessions with Dr. Al Carlisle suggest the California native could have even more victims.