GREENSBURG — A Pennsylvania teenager was convicted Thursday of first-degree murder, kidnapping, conspiracy and lesser murder charges in the torture killing of a mentally disabled woman who prosecutors said was targeted by the teen who viewed the victim as a rival for the romantic affection of a man.

Later this year, the man faces the possible death penalty at trial for his alleged role.

A Westmoreland County jury deliberated less than four hours Thursday before convicting Angela Marinucci in the February 2010 death of 30-year-old Jennifer Daugherty after eight days of testimony. The murder conviction alone carries a mandatory sentence of life without parole as Marinucci couldn't face the death penalty because she was just 17 at the time.

District Attorney John Peck said Marinucci instigated the 36-hour ordeal in a dingy apartment in Greensburg that was shared by five other defendants awaiting separate trials.