PARKLAND, Wash. — The Pierce County Sheriff’s Office says two people were arrested Sunday night – one week after a Parkland teen was shot and killed in front of his girlfriend. The department says one of the suspects, a 25-year-old man, was arrested by the Snohomish County Sheriff’s Office. The second suspect, a 26-year-old woman, was arrested by Tulalip police at the Walmart. Detectives are still looking for other people of interest in the case.