EUGENE, Ore. (AP) — Police say they are investigating the shooting deaths of a mother and son at a home in Eugene as a probable murder and suicide. KTVL-TV reports until an autopsy is complete, investigators are not clear on who fired the gun. Police Chief Chris Skinner says the father of the family heard gunshots and ran from the house to call police shortly before 3 p.m. Thursday. A grandmother in the household was able to escape from the basement as police arrived, police said. Investigators believe a dispute took place before the shooting.