20/20

Runtime: 1h 23m

After a young college student is found strangled on the side of the road, the case goes cold until an eerily similar attack breathes new life into the investigation and helps enforcement catch a killer.

Runtime: 1h 22m

Allison Feldman, 31, was working in medical sales when she was found dead in her Scottsdale, Arizona, home in 2015. The crime shocked the community and left detectives with one major question: who could have committed such a violent attack without leaving an obvious connection to the victim?

Runtime: 1h 23m

Catherine "Cati" Ann Blavatsky, 22, is found dead inside a concrete box in the basement of an abandoned farmhouse. Her estranged husband goes on the run with a 17-year-old, leading authorities on a cross-country chase.

Runtime: 1h 23m

In June 2014, a highway worker cutting grass discovers two large suitcases with foul odors beside a rural road in Wisconsin. Inside, investigators find the bodies of Jenny Gamez and Laura Simonson, leaving a community shocked and searching for answers.

Runtime: 1h 24m

Dee Warner, a successful businesswoman, goes missing without a trace. A deadly mystery. Families bitterly divided. What really happened?

Runtime: 1h 25m

Faith Hedgepeth, a college sophomore, is found murdered in her apartment in 2012. Now, with the verdict just in, see exclusive interviews with the jurors, investigators, and friends.

Runtime: 1h 23m

It remains one of the country’s most haunting unsolved murders: 6-year-old JonBenét Ramsey found brutally murdered in her Boulder, Colorado, home. Thirty years since the horrific crime, questions continue to surround her death. Now, there's new evidence and the DNA sample known as Unknown Male 1.