Coral Watts is the subject of true crime series “Unknown Serial Killers of America." The series explores murderers unknown to the general public.

Christopher Wilder was free to attack 11-year-old and 10-year-old girls in Boynton Beach. Then he abducted 12 and killed 9 across the U.S.

The 22-year-old Fairfield man may not fit the traditional idea of a serial killer, but one expert says that’s exactly what he is.

Jurisdictional hurdles have accounted for a lack of communication between law enforcement agencies, creating its challenges to connect crimes, as was the case for Carl “Coral” Watts, once slated to be the first serial killer released from prison and the focus of Unknown Serial Killers of America ’s season premiere.

The notorious serial killer, known to have killed at least four victims linked to San Bernardino County, has been linked to a 45-year-old cold case.

Get all the details on the new "Unknown Serial Killers of America" docuseries premiering today, May 18. Find out how to watch for free.

Glen Rogers once told police he had killed about 70 people. He was executed by lethal injection Thursday in Florida.

Judge John Born set millionaire Christopher Wilder free to kill 9 but the judge stood up to the Kennedys. Here's how

Rose West was charged with 10 counts of murder, while her husband, Fred, was charged with 12. Here's everything to know about Fred and Rose West's crimes.

Two young girls were walking in downtown Boynton Beach when a man pointing a gun abducted them. Christopher Wilder would become a serial killer.