Medical cause suspected in freeway fatality crash

  CUSTER — A 79-year-old man died in a collision Thursday, Aug. 8, when his vehicle went off northbound Interstate 5 at the Birch Bay-Lynden Road exit.   The man was pronounced dead at the scene. Authorities believe the accident was the result of a medical emergency, said Trooper Heather Axtman, Washington State Patrol public information officer,…