(Gresham, OR)  --  The death of a woman, whose body was found in her mobile home in Gresham, is being investigated as a homicide.  Police say 70-year-old Deanna Stivahtis was found dead Saturday afternoon as family members went to check on her at the trailer on Northeast Division Street.  Police say a green 1989 Dodge Caravan that belonged to Stivahtis, with Oregon plat WQS 804, is missing.  The vehicle is reported to have extensive damage on the passenger side, and anyone who spots it is being asked to immediately call 9-1-1.