An Upper Marlboro woman, accused of stabbing her sister-in-law to death last year, was found guilty of first-degree murder last week by a Charles County jury.

Tonya H. Rollins, 39, had had an ongoing dispute with her husband, Leroy Rollins Jr., until he moved out of their Upper Marlboro home in April 2003 and into the Waldorf home of his sister, Faye D. Green, 34, police said.

In February 2004, after Tonya Rollins learned where her husband was living, she went to the house, broke a window and jumped on the hood of her husband's car, according to charging documents. Tonya Rollins told her husband that Green was the source of their problems and threatened to harm her, police said.

Green, the mother of three children, was found in her bedroom early on Feb. 10 with stab wounds covering her body and with a knife embedded in her torso, police said. She was pronounced dead a short time later at Civista Medical Center in La Plata.

Police and family members said after the stabbing that Tonya Rollins had been involved in a series of altercations with members of her estranged husband's family, whom she blamed for their marital difficulties.

After a weeklong trial in Charles County Circuit Court, the jury found Tonya Rollins guilty Monday of the murder charge as well as first-degree burglary and a charge of carrying a weapon with intent to injure. She faces a maximum sentence of life in prison without parole. The sentencing is scheduled for Jan. 25.