After the recent high-profile murder of Bronx teen Lesandro Guzman-Feliz, the spotlight is on the gang cops say is responsible, the Trinitarios, and the unique reaction to the violence from the community.

Professors Bryanna Fox and Edelyn Verona of the University of South Florida are leading a project that evaluates all inmates that come through the Pasco County jail to compare people who are arrested for domestic violence to people arrested for burglary to people arrested for murder.

Meet Suge, a top lieutenant with the notorious gang Sex Money Murder (or SMM) as he's preparing to murder, in this excerpt from Jonathan Green's book, 'Sex Money Murder: A Story of Crack, Blood, and Betrayal.'

A&E True Crime talks to retired FBI profiler Dr. Mary Ellen O'Toole about serial killers, like Ted Bundy and the Toolbox Killers, who had well-defined victim preferences.

Rebecca Morris, a New York Times bestselling author and high-school classmate of murder victim Dick Kitchel, returns to her hometown of Corvallis, Oregon to explore how the cold case murder changed the town and the lives of Kitchel's friends.

There were three homicides or suspicious deaths on cruise lines operating in U.S. ports in 2017. And authorities have also reported over a hundred other crimes, including sexual assaults and kidnappings. But some advocates say even more crimes are taking place aboard.

Bryanna Fox, Ph.D, former FBI agent and researcher at the bureau's Behavioral Science Unit, talks to A&E True Crime about whether convicted serial killers are the key to catching active serial killers.

In 1937, three young girls were sexually assaulted and strangled after playing at an Inglewood, California park. A suspect was caught, convicted and sentenced to death. Pamela Everett, a journalist, lawyer and niece of two of the girls, explores the tragedy and investigates whether the wrong man was convicted of the murders.

David Finkelhor, director of the Crimes Against Children Research Center and author of the book 'Nursery Crimes,' on why some babysitters kill and how parents can prevent their children from falling victim.

Tom Stankiewicz, commander of the Erie bomb squad who responded to the 2003 'Pizza Bomber' case, tells us how bomb squads operate and what new tools his team started carrying after the Brian Wells case.