They are a doctor at work. I know the head of security very well and he has asked them to contact him but won't pass me they're contact details until he has questioned them. The hospital CCTV playback is very sophisticated, if you select a zome in the frame it only shows you motion through the zone. Also, when u mark a target it checks all CCTV camera footage and plays back all matches. Due to the good quality picture I can see the car arrive and zoom into the undamaged region then zoom into footage later and see the newly acquired damage. We can also follow the member of staff as they travel from the car around the hospital and burn it to disc.
If they don't fess up the police will be called and evidence passed.