(Rainier, OR)  --  Rainier police are now investigating the deaths of a man, his wife, and their young son as a double murder-suicide.  The Columbia County Medical Examiner's Office says 44-year-old Laury Abbott and six-year-old Danny Abbott, Jr. died of stab wounds.  Officials believe 48-year-old Danny Abbott, Sr. killed his wife and son before dying of self-inflicted wounds.  All three were found dead Sunday night at their home on Fern Hill Loop in Rainier.