When a wealthy doctor is found murdered in his Texas home, a tip leads investigators to the victim's girlfriend's ex-boyfriend.
Failed efforts to free American humanitarian aid worker Kayla Mueller from ISIS captivity following her 2013 kidnapping.
The investigation into the 2007 disappearance of a soccer mom reveals she had been running an escort business and one of her clients may be to blame.
Diane Sawyer sits down with Elizabeth Vargas to discuss Vargas's secret struggle with alcohol and anxiety as revealed in her book "Between Breaths: A Memoir of Panic and Addiction''; anxiety and alcohol abuse among Americans is examined.
The investigation into the killing of a criminal law professor leads detectives to suspect the murder is the result of a family feud.
Friends, Family Stunned to Learn UNC Student Is Dead; FBI Develops Profile of Murdered UNC Student's Killer; Police Remain Confident They Will Find Faith Hedgepeth's Killer.
After being indicted for second degree murder by a grand jury, Nick Hillary, a black man accused of killing 12-year-old Garrett Phillips, faces trial in an all white town. Garret's mother, Tandy Cyrus, reflects on the emotional aftermath of losing her son.
After two trials, Kimberly Long was convicted of brutally murdering her boyfriend, Ozzy Conde, has spent seven years in prison, and, with the help of The California Innocence Project, she now has a new shot at justice. With her conviction overturned and the possibility of a third trial, 20/20 investigates whether she really committed this violent crime as the prosecution alleges. ABC News Correspondent Matt Gutman sat down with Kimberly as she tells her side of the story.
University of Virginia's former Associate Dean of Students Nicole Eramo talks about the Rolling Stone article detailing the alleged gang rape of one of the school's students at a frat party.
Christopher Waide is convicted of the 2014 murder of 19-year-old Lea Porter and is sentenced to 48 years in prison; the report includes never-before-seen police interrogation videos, surveillance videos and crime scene photos.
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