In January 1977, Gary Gilmore gained international attention for his choice to die by firing squad after being sentenced to death for the murder of two young Mormon men.

A&E True Crime looks at five pairs of infamous best friends who did everything together—including murder.

Since his incarceration in 2004, for the murders of 71 teenage girls and women, 'Green River Killer' Gary Ridgway has lived a life of isolation at Washington State Penitentiary.

Margaret Press, co-founder of DNA Doe Project, spoke with A&E True Crime about how investigative genetic genealogy helped identify Francis Wayne Alexander as Victim No. 5 of serial killer John Wayne Gacy.

The 1995 murder of Maurizio Gucci, former heir to the Gucci fashion empire, led to the conviction of his ex-wife Patrizia Reggiani, and others, in a high-profile case that made headlines across the world.

On July 29, 1994, 7-year-old Megan Kanka was killed by Jesse Timmendequas, a convicted sex offender who lived across the street.

From teen victims Libby German and Abby Williams to Alonzo Brooks to the 'Jennings 8' and more, we look at some murder cases that investigators could use the public's help in solving.

Abdon Pallasch, former legal affairs reporter, spoke with A&E True Crime about his years reporting on R. Kelly and why it took nearly three decades for the singer to be prosecuted for his crimes against underage girls.

Shi Yan, an assistant professor at Arizona State University's School of Criminology and Criminal Justice, spoke with A&E True Crime about the importance of plea bargains and their impact on today's criminal justice system.

On January 13, 1992, the serial killer changed his plea from not guilty to guilty but insane, which removed the need for a criminal trial and forced the verdict to be based on the jury's decision of his mental state.