“Fail To Report An Accident”

My son received a failure to report an accident ticket today $110---he says he didnt hit her car in his doctors parking lot. he went to the appointment and came out to find her and her co workers standing there saying he hit her car -he said no and well cops came and he got a ticket for not reporting -- he was at the doctor and hadnt left the parking lot---The co-workers apparently are witnesses --but his tickets does not have any witness marked down and all that they listed was his plate and on do they not have to put make and model of the car