Snapped Notorious: Prescription for Death, Charles Cullen

Nurse Charles Cullen is one of America’s most prolific serial killers. Police say he may have murdered up to 400 victims, Cullen claimed he acted mercifully. An in-depth look into the case reveals the truth behind his motives.

Season 99 Episode 2 - Videos

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Snapped Notorious: Prescription for Death Airs Saturday, May 12th

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Snapped Notorious: Prescription for Death, Charles Cullen

Season 99 Episode 2 - Videos

Trending on Oxygen

Killer Reveals Himself in the Horrifying "Rage Killing" of Millard Aldridge

Omar Rueda-Denvers Speaks Out at His Trial and Reveals Motive of Murder

“Bizzare Markings” Found at Juanita Wofford’s Home

Criminologist Explains Necrophilia

Anthony Templet Speaks Out After Shooting His Father

Anthony Templet Shot His Father in His Arm, Chest and Head

16-Year-Old Meghan Landowski Was Stabbed to Death in Her Home

Inconsistent Details Surrounding Murder of West Virginia Man

Your First Look at Cold Justice Season 7

Adrienne Jones Caught In Deadly Love Triangle

"War Room" Established by Portsmouth Police in Stabbing Death of Teenager

Blood Found Dripping from Brand New Car Trunk

Bert Richter Recalls Seeing His Mother Get Attacked as a Child

Your First Look at Sins of the South

Who Was Skilled Poker Player Donald Idiens?

Kris Jenner Shares Details on O.J. Simpson's Relationship with Nicole Brown Simpson

Did Yolanda Holmes’ Boyfriend Play a Role in Her Death?

Bruce Brenizer Was Interviewed Multiple Times