A small child is the only witness to a terrible crime: the murder of her mother. But investigators say they can't rely on her testimony because she is just a toddler. Will her memories prove true and bring a killer to justice? Sat, 21 Nov 2009 13:56:52 GMT

A young woman feels lucky to have a second chance: After a failed marriage, she was back together with the man she'd loved since high school. That is, until one morning, when a single shot rang out in a parking garage. What happened to Ed Schiller? Fri, 13 Nov 2009 16:58:01 GMT

When a well-liked young man lost his wife and son on a family outing, an entire town mourned. But there was somebody who suspected the tragedy was no accident. But will a widower's best friend come forward and accuse him of causing his family to fall over a cliff? Mon, 9 Nov 2009 16:56:39 GMT

See images of Bob Duke, convicted of murdering his wife, Liana, and five-year-old son, Erik. The two plunged to their deaths off a cliff. Sat, 31 Oct 2009 13:01:47 GMT

Her name was Christie, and she was just 25 when she was found murdered in her home. But with few clues, the case soon grew cold. No evidence stuck out at the crime scene — except for a burnt cigarette. Was it left behind by her killer? Sat, 24 Oct 2009 13:50:14 GMT

Detectives play the role of Cagney and Lacey in a cold-case murder where the key evidence is a burned-down cigarette. But the real closer in this 20-year-old case is the victim herself, from beyond the grave. See it Friday, Oct. 22 at 9 p.m. ET, 8 p.m. CT on Dateline NBC. (Dateline NBC) Fri, 23 Oct 2009 14:02:32 GMT