Police are investigating after a woman was found shot to death in her southwest Houston home.

It happened overnight Sunday at the victim's home on the 500 block of Trafalgar Drive near South Post Oak Road.

Police say the 44-year-old woman lived with a man in his early 60s, who is handicapped and in a wheelchair.

Investigators say they are unsure of their relationship, but neighbors tell Local 2 she was his caretaker.

According to homicide detectives, police were called to the home at around midnight and discovered the woman shot in the head. 

She was pronounced dead at the scene.

The victim's roommate was at the house when police arrived and was taken into custody for questioning.

Investigators say they are trying to figure out whether this shooting was accidental or intentional.