According to articles from King 5 and QFox13 a body has been found in Wilburton Park, next to the Bellevue Arboretum in Bellevue. It appears that the body was the corpse of a man who had been shooting at police earlier.
The KING article does not specify if the guy shot himself, or was killed by responding gunfire when he made the grave mistake of firing at Bellevue’s Finest. But QFox did say that it was a self-inflicted gunshot and both articles had said the police first responded to a call about a suicidal man.