DATELINE 24/7

A double homicide in upstate New York leads detectives on a cross-country investigation to piece together a case with a surprising suspect at the center.

Convicted murderer Drew Peterson speaks out about the murder of his third wife and the disappearance of his fourth wife in his first network TV interview in more than a decade insiders close to the case speak out, including Stacy Peterson's sister.

The discovery of a 19-year-old's car abandoned on a bridge in New Jersey turns into a missing person case that evolves into a months-long homicide investigation police discover a plot involving money, close friends and a fatal betrayal.

A 21-year-old college senior is shot and killed in a public park just months before her graduation.

Months after a woman and her husband come down with the same mysterious illness, the woman dies after experiencing the same symptoms old recordings reveal the twisted truth about her demise.

Nearly 40 years after a high school senior is found stabbed to death in her car after visiting the mall days before Christmas, investigators identify the killer.