(Portland, OR)  --  A Gresham man is facing a manslaughter charge following a deadly crash in Clackamas County.  Police arrested 54-year-old Robert Walsh Saturday night for the death of a 71-year-old motorcyclist.  Police believe Walsh was intoxicated when he crashed into the motorcyclist on US 26 near milepost 47.  The motorcyclist's passenger was hospitalized for serious injuries.