Montgomery County police said a Silver Spring woman killed the father of her 6-year-old son by stabbing him early Wednesday, but they may never charge her because they believe that the man repeatedly abused her.

Alisha Bryant, 26, may have been acting in self-defense when Sean Pack, 26, was stabbed to death, said Lt. Eric Burnett, a spokesman for Montgomery County police.

Bryant and Pack got into an argument about 1 a.m. Wednesday at Bryant's home in the 600 block of Northampton Drive.

Pack was pronounced dead at Washington Hospital Center about 2 a.m., police said.

On June 24, a Montgomery District Court judge ordered Pack to stay away from Bryant's home, according to court records. It was at least the fourth such order since 1999 ordering him to stay away from Bryant and their son, said Hannah Sassoon, domestic violence coordinator for the sheriff's office.

In the June 24 application for a protective order, Bryant alleged that on June 19, Father's Day, Pack kicked in the door to her home and poked her "in the eye," according to documents filed in District Court.

She also alleged that Pack had thrown a beer can at her back when she was seven months pregnant; that he threw a rock through her mother's window; and that he held her against her will "for hours in the woods" while she was pregnant.

Sheriff's deputies could not find Pack to serve him with the protective order, Montgomery County Sheriff Raymond M. Kight said.

Pack had several outstanding warrants for his arrest, law enforcement authorities said. The alleged crimes could not be determined yesterday.

Pack was convicted in 1996 of disorderly conduct for his involvement in a large fight in the 8600 block of Flower Avenue in Takoma Park, court documents show.

Pack knocked on Bryant's door for a long period of time on Wednesday, Burnett said.

When police arrived about 1:16 a.m., Pack was on a floor in Bryant's home with a knife in his chest, Burnett said.

Staff researcher Bobbye Pratt contributed to this report.