Bike Collision April 7th

Friends of bike rider seek information about the collision that occurred on Wednesday 7th of April between 12:30 and 1pm somewhere around Brighton Ave or Commerwealth Ave. Brighton/Allston.  The rider suffered severe concussion and cannot remember anything about the event. We are particularly hopeful of getting in touch with the driver of the car, who was a very helpful man who assisted Elizabetha to Boston University medical center. His contact details were lost at the hospital. If anyone has information please let us know.