A young Pennsylvania couple accused of strangling and stabbing a man for fun after luring him to their car through a Craigslist ad has pleaded guilty to murder, The New York Daily News reported on Tuesday.

The nicknamed "Craigslist killers" Miranda Barbour, 19, and her husband, Elytte Barbour, 22, confessed to killing Troy LaFerrara, 42, on Nov. 11, 2013. His body was found in a Sunbury alley in November 2013, after being stabbed 20 times.

A deal allowed the Barbours to plead guilty to second-degree murder, aggravated assault, robbery and possession of an instrument of crime in exchange for a life in prison sentence, as well as avoiding the death penalty, according to UPI.

Police said the couple met LaFerrara through Craigslist with the goal of murdering someone together. They had only been married for three weeks when they committed the murder, specifically posting the ad to lure a victim. 

The ad offered companionship for men who "hated their wives." LaFerrara answered the ad and Miranda Barbour met him in a local mall parking lot on Nov. 11, 2013, which happened to be Elytte Barbour's 22nd birthday, according to Jezebel. 

Elytte Barbour hid in the backseat until they attacked. Once LaFerrara was dead, they stole his wallet, dumped his body in an alley, cleaned their car with supplies they bought at Walmart, and went to a strip club, according to Jezebel.

Miranda Barbour grew up in the North Pole. She has claimed to have killed 22 other people starting when she was 13, mostly in Alaska as part of a satanic cult, according to the Alaska Dispatch News. 

If her claims are true, and she did kill 22 to 99 people over the span of six years in Alaska, California, North Carolina and Texas, that means she got away with murder every few weeks to every few months since she was 13 years old.