(Portland, OR)  --  Police say they've made an arrest in connection to a triple homicide in northeast Portland.  Police arrested 58-year-old Brett Pruett Saturday for the shooting Friday night at a home near Northeast 122nd Avenue and Brazee Street.  Police say he shot and killed 77-year-old Lawrence Murphy, 45-year-old Elmer E. Hughes and 40-year-old Tashia Cobb.  He's facing three counts of murder.  Police are still looking for a motive.