20/20 on ID Presents: Homicide - Episode Guide

In Jacksonville, Fla., four young black men listen to rap music in their vehicle at a gas station, then a middle-aged white man confronts them over the volume of their music and brandishes a gun, turning the dispute into a deadly one.

Unabomber Ted Kaczynski's brother and sister-in-law discuss clues, evidence and what went in to the decision to turn Kaczynski over to authorities.

Millionaire Marjorie Nugent is found dead in her freezer.

Bob Angleton, a bookie and police informant, is twice charged with killing his wife in a Texas tale of double crosses, adultery, blackmail, and murder.

A young woman is found beaten to death. Her coworker is found bound and bleeding. Detectives begin hunting for two masked men described by the sole survivor. But the evidence takes the investigation down an unexpected path.

In Canyon Lake, Calif., a serial killer targets women, then the killer is finally caught, and no one can believe the face or motives behind the cold-blooded murders.

In Syracuse, N.Y., Jeff Cahill beats his wife, Jill, to within an inch of her life with an aluminum bat, then he sneaks into her hospital room and murders her.

Sharon Marshall dies in a suspicious hit-and-run accident, leading investigators to uncover a sordid tale of kidnapping, child abuse, murder, and false identities.

When fishermen in the Florida Everglades make a gruesome discovery, it unleashes a mystery about a woman, a mobster, and a murder.

When Laura Miller vanishes, police locate her remains along a Texas highway where over two dozen other young women have also turned up dead for over three decades.

In, Bloomington, Ill., a woman and her three children are murdered.; authorities delve into the mystery of who committed this heinous crime which points close to home, but all is not as it appears.

Dr. Amy Bishop shoots and kills three of her colleagues after being denied tenure, then investigators learn Bishop killed her brother with a shotgun 24 years prior, prompting many to ask if the tragic deaths could have been avoided.

A trail of death follows a couple intertwined in love, secrets and partnership; dark and mysterious questions loom after a new life begins thanks to a stolen identity.

A young woman who has good looks, brains and talent is found murdered, leading to the discovery that she has been leading a double life.

The terrifying and macabre story of Kraig Kahler who killed his family a few days after Thanksgiving in 2009.

A socialite is murdered in Memphis, Tenn., leading investigators to question suspects who have become ensnared in a tangled web of money, drugs and revenge, but the answers to this mystery may lie closer to the crime scene.

Sixteen-year-old Selena Stoian is left to piece together what went wrong with her family in such a short period of time when she finds her mother, Maria, dead and father, Stefan, missing.