BELFAST, Maine (AP) — A man was charged on Thursday with murder in a shooting that killed a woman and critically wounded her son.

Todd Gilday shot Lynn Arsenault on Wednesday night after forcing himself inside a Belfast home where she was visiting her son, 22-year-old Mathew Day, a police affidavit said. An autopsy concluded the 55-year-old Arsenault, of Garland, died of a gunshot wound to the chest and arm.

Gilday also is accused of shooting Day in the stomach. Day was hospitalized in Bangor, where police said his condition had been upgraded to stable.

When police arrived at the home, they found Day lying across his mother's body on the floor, the affidavit said.

Gilday was arrested Thursday morning at a hospital in Rockport, where he had checked himself in.

Police haven't disclosed a motive for the shootings but said they weren't random. The 44-year-old Gilday knew Day but not his mother, state police spokesman Steve McCausland said.

Gilday was jailed and couldn't be reached for comment. It was unclear whether he had an attorney.