GREAT FALLS, Mont. (AP) — The body of a toddler found in the trunk of his mother's car may have been there for months as she drove around town, evaded questions about him and was even arrested, police said.

The mother, Summer ManyWhiteHorses, was charged Monday with deliberate homicide. Authorities say the body of her 2-year-old son, James, was found Friday in the trunk of her car — more than six weeks after it was towed to a wrecking yard when she was arrested.

Deputy County Attorney Joel Thompson said authorities have yet to determine how or when the boy died. An autopsy is being conducted. According to court records, ManyWhiteHorses told police the boy's death was an accident and that she placed his body in the car's trunk on May 29.