48 Hours: Hard Evidence

Detectives find evidence of domestic abuse while recovering clues from a woman's body in Colorado's Blue River.

Although investigators believe they know who killed Irene Garza, they have no hard evidence or witnesses.

A jury must decide whether Brian Eftenoff is guilty of murdering his wife, Judi, after she dies of a cocaine overdose.

When Assistant District Attorney Steve Tauzer is found brutally stabbed to death in his garage, a former colleague and friend becomes a chief suspect.

In Sugar Land, Texas, two members of the Whitaker family are shot dead by a masked intruder; two members survive the ambush; police believe the family interrupted a burglary, until they uncover a conspiracy involving one of the family members.

Because of false testimonies, two people are imprisoned for murders they didn't commit; Gloria Killian is convicted of masterminding a robbery-homicide, while Clarence Elkins receives life for rape and murder.

Devout Mormon Faylene Grant records having visions of her imminent death; her husband, Doug, then finds her lifeless body in the bathtub of their home.

When Sheila Bellush is shot to death, police suspect she is the victim of a murder-for-hire plot orchestrated by her ex-husband, Allen Blackthorne.

Twins Betty and Peggy are both accused of hiring a hit man to kill Betty's husband; one twin is found guilty following the hit man's shaky testimony, while the other is let off.

More familiar with liquor-law violations than violent crimes, a detective joins the cold-case squad and investigates the 20-year-old murder of Amy Weidner.

Joan Porco recants after indicating that her son, Christopher, is responsible for the savage attack with an ax that claimed her husband's life, and she begs investigators to leave Christopher alone.

Attorney Catherine Shelton leads a storied life which includes several run-ins with the law, then she becomes mired in an investigation that results in the conviction of her husband for murder.

Carlo Ventre violates a custody agreement with his former partner, Toni Dykstra, when he takes their baby daughter to Italy, but what begins as a case of international parental kidnapping ends with a tragic death.

After aspiring actress Ashley Barnett dies while on a three-day party cruise, her mother searches for answers; George Smith disappears on his honeymoon cruise.

In 1993, 18-year old Tricia Pacaccio was stabbed to death. Neighbor Michael Gargiulo was an early suspect, but there wasn't enough evidence to arrest him. Garguilo fled to California where his appetite for murder grew. Maureen Maher has the story.

In 1988, Mel Ignatow sexually tortured and murdered Brenda Schaefer. After a jury acquitted Ignatow, photos of the torture emerged. But the U.S. Constitution states a person can't be tried twice for the same offense. Erin Moriarty has the story.

Three years after April and Justin Barber wed; they were shot while walking on a deserted Florida beach. April was killed and Justin was shot four times, but survived. He said it was a robbery gone wrong, but police disagreed. Harold Dow reports.

In 2015, attorneys for David Temple were appealing his 2007 conviction for the murder of his wife with evidence that then prosecutor Kelly Siegler didn't share with the defense and information on another possible suspect. But will they be able to win?