SEATTLE (AP) — Police have arrested a man suspected of stabbing his 11-year-old brother to death in suburban Seattle. KIRO-TV reports the boy and his 22-year-old brother were involved in a violent confrontation inside a home in Renton on Saturday. The boy ran out of the home to escape, and officers called to the scene found him lying on a sidewalk. He died at a hospital. The 22-year-old is being held for investigation of homicide, and police say he appears to have a history of mental illness. Investigators have not released the names of the brothers.