Police say a 74-year-old Maine man faces charges in the shooting deaths of two tenants inside an apartment he rented at his home over a possible dispute about where they were parking their cars during a snowstorm.

Maine State Police say James Pak was arrested at about 10 p.m. Saturday following a standoff at his home in Biddeford. He is charged with killing 19-year-old Derrick Thompson and Thompson’s girlfriend, 18-year-old Alivia Welch.

Officials say police were called Saturday evening regarding a dispute over cars being parked in Pak’s driveway during the snowstorm. Minutes after police left, they received a call reporting the shootings.

Thompson’s mother, 44-year-old Susan Johnson, was being treated for a gunshot wound at Maine Medical Center in Portland. Johnson’s 6-year-old son was not hurt.