According to Moraine police Sgt. Russ Imler, the preliminary investigation has found that Curtis Mason, 53, of Union, pulled away from a stop and into the path of the motorcycle at about 4 p.m.
Murphy was taken to the hospital by CareFlight. Mason was not injured.
The motorcycle was headed south on Ohio 4 and the car was headed east on Union, Imler said. Mason had a stop sign and the motorcyclist had the right of way, he said.