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A woman was found shot to death Monday afternoon at an Orem apartment, and her boyfriend killed himself during a standoff with police in Eagle Mountain.

Her boyfriend, described by police as a "person of interest" in the homicide, barricaded himself in a car in Eagle Mountain while sheriff's deputies tried to speak with him, said Orem Police Lt. Craig Martinez. David Brigham Driscoll, 37, of Eagle Mountain, fatally shot himself during the standoff, said Utah County Sheriff's Sgt. Spencer Cannon.

Orem police first discovered the homicide of Driscoll's girlfriend about 2:15 p.m., when someone called officers to the woman's apartment, near 1700 South and 400 East, to check on her, Martinez said.

No one answered when officers knocked on the door, but the door was unlocked, so officers cracked it open to announce they were there, Martinez said.

From the door, they could see the woman, identified as 27-year-old Brittany Engstrom, lying on the floor, Martinez said. She had suffered multiple gunshot wounds.

Utah County sheriff's deputies later found Engstrom's boyfriend in Eagle Mountain, where he was barricaded in a car in the Ranches subdivision, Martinez said. Driscoll has a military background, which left officers concerned that he had multiple guns in the car, Cannon said. As sunset approached, deputies beamed lights toward the car to prevent Driscoll from running away, Cannon said.

Instead, Driscoll shot himself. He previously was charged with four counts of aggravated sexual abuse of a child and was scheduled to appear at a preliminary hearing Tuesday, Orem police said.