The King County Sheriff's office is investigating the death of a 4-year-old Enumclaw boy who died Thursday.
Spokesman Sgt. John Urquhart says the boy was first taken to Valley Medical Center in Renton on Sunday and later died at Mary Bridge Children's Hospital in Tacoma. Hospital officials had reported the boy's injuries as suspicious to police.
The boy was being watched by his mother's boyfriend while she was at work on Saturday. She returned home and was up all night with her sick son