Ex-girlfriend's chilling encounter with Ted Bundy.

A new true-crime docuseries, "Violent Minds: Killers on Tape," features an interview with one of Ted Bundy's ex-girlfriends, known as "Sandy," who describes how Bundy held her underwater for nearly a minute and liked choking her during sex. The docuseries explores the unearthed recordings of Dr. Al Carlisle, a psychologist who evaluated Bundy after his first arrest in 1975. Carlisle believed that killers like Bundy could present an acceptable public persona while harboring a dark secret that involved violent fantasies. The series premieres on Oxygen on April 2.