Becca van Sambeck

Oxygen digital correspondent Stephanie Gomulka spoke with Alyssa Maddox, the co-executive producer of "Snapped," ahead of its landmark Season 30 premiere.

Most people find Chucky sweet, charming, and completely harmless when they first encounter him. They're wrong.

Keith Hunter Jesperson lived a double life as a dad of three and the vicious serial murderer, "The Happy Face Killer."

Melissa Witt was killed in Arkansas in 1994. Some theorize she may have been the victim of a local serial killer, "The River Valley Killer."

A duo known as the Serial Shooters stalked Phoenix, Arizona the same time the Baseline Killer did.

"Mark Of A Serial Killer," which returns to Oxygen on Saturday, April 2 at 8/7c, takes a deep dive into the most disturbing murder cases of all time.

In "Velvet Was The Night," written by Silvia Moreno-Garcia, two people search for a missing art student for very different reasons.

"Snapped" has featured many disturbing and jaw-dropping murder cases over the past 29 seasons.

"I beat her to death, raped her, and loved it. Yes, I’m sick but I enjoy myself, too," serial killer Keith Hunter Jesperson wrote in one chilling bathroom wall message.

Here's how murderers like "The Giggling Granny" and "The Barbie and Ken Killers" got their names.