Their bawdy story became a “true crime” book several years ago, and now Billy Sullivan and Nicole Kasinskas, the Nashua couple convicted of conspiring and carrying out the murder of Nicole’s mother, Jeanne Dominico, 10 years ago this week are the subject of an episode of the Oxygen Network’s “Snapped: Killer Couples” series.

The episode has already been on a couple of times, but is scheduled to air again Sunday – today – at 3 p.m.

From Oxygen’s promo: “Nicole Kasinskas was a normal girl and a stellar student. One day, the lonely girl with divorced parents met a troubled teen named Billy Sullivan on the internet, and relished the attention. Her mother didn’t want her to move in with her new boyfriend, Billy Sullivan. How far will the teen couple go to stay together?”

Sullivan was found guilty in June 2004 of first degree murder and two counts of conspiracy to commit first degree murder for stabbing and slashing Dominico, 43, multiple times in her Dumaine Avenue home.

He is serving life in prison with no possibility of parole.

Kasinskas agreed in 2005 to plead guilty to accomplice and conspiracy charges and to testify against Sullivan in exchange for a 40-year-to-life sentence.

More information and video excerpts of the “Snapped: Killer Couples” episode can be found at http://features.oxygen.com/videos/Killer%20Couples/Season%201/vid:2631751.

– DEAN SHALHOUP