15-year-old boy arrested in death of 10-year-old Kiaya Campbell

THORNTON, Colo. -- (KDVR) -- A 15-year-old boy was arrested late Saturday night in the death of 10-year-old Kiaya Campbell, the Thornton Police Department said Sunday.

The boy was booked into the Adams County Juvenile Detention facility for investigation of first-degree murder.

Campbell disappeared Wednesday night.

Her father told police that she and his girlfriend's 15-year-old son left home in the 12400 block of Forest Drive about 8 p.m. to walk to a nearby shopping center.

The 15-year-old boy told police they got separated when a rainstorm moved in. She was reported missing just before midnight.

An Amber Alert was issued Thursday, and officers and volunteers canvassed the area all day.

Her body was found Thursday evening in a grassy area near East 128th Avenue and Jasmine Street, about one mile from the home.

Police have not said whether the suspect is the father's girlfriend's son.

"Because of his status as a juvenile, his name is not being release," police stated.

An exact cause of death has not been released but the coroner confirmed it was “other than accidental.”

On Friday, police confirmed her death was being investigated as a homicide.