Detectives work to bring justice to their fallen comrade after the body of a police lieutenant is found floating in a lake.

Atlanta detectives search for the murderer of a young paralegal who was discovered in his Lakewood Heights home bound and stabbed to death.

When an 11-year-old finds his mother brutally slain in their condo, the police learn that her death was the handiwork of a serial killer.

When a grad student is found murdered in her own apartment, the detectives follow the clues to an evil that changes how they investigate sex crimes.

When a police officer discovers a dead body in a taxi, detectives rely on surveillance footage to piece together the mystery of who committed the murder.

Yolanda Saldivar, Selena Quintanilla-Perez's former fan-club president and friend, was convicted of shooting the 23-year-old singer in the back and killing her.

Murderer Yolanda Saldivar attempts to gain a new trial when she claims the prosecution had evidence her defense team never had access to.

Convicted killer Yolanda Saldivar opens up about her relationship with Tejano music superstar Selena Quintanilla Perez with new information.

Yolanda Saldivar and her family offer documents and information to shed light on what happened inside the hotel room when Selena was killed.

A family copes with the complicated aftermath when an officer's wife is shot to death in her bed, and secrets begin to emerge related to the case.

Journalist Andrea Canning takes a look at the emotional interview of a daughter whose mother was murdered but had been a light in so many lives.

After filming wraps on a horror movie, the cast members learn that their lead actress is not who she says she is and has and has been charged with murder.

The correspondents of the television show "Dateline" choose and answer questions such as what their most memorable of the show is and why.