We speak with author Casey Sherman about his book 'Helltown' on Tony Costa's murderous rampage in Cape Cod, Massachusetts in 1969.

On July 31, 1970, 4-year-old Heidi Jones found the body of her mother, 23-year-old Loretta Jones. Heidi Jones-Asay recounts the 46 years leading up to Thomas Egley's long-awaited guilty plea.

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.

According to testimony from friends and family, victims of the "Killer Clown" shared some surprising common connections and tragedies in their lives.