(Tigard, OR)  --  Tigard police continue to investigate a crash that left a Beaverton woman dead.  Authorities say 50-year-old Marilyn Backstrand was driving along Southwest Roy Rogers Road Saturday morning when a vehicle crossed over from the opposite lane and crashed into her.  The second driver, 31-year-old Carlos Leon of Beaverton, was injured and taken to a hospital.  No citations have been issued so far.