Chatham-Kent police have charged a 25-year-old Wheatley man after a collision with an ambulance in July.
Logan Simpson, 25, was arrested and charged with dangerous driving causing bodily harm.
The head-on collision between two vehicles took place on July 3 around 10 a.m. on Queens Line, just east of the Highway 401 exit in Chatham-Kent.
Police say Simpson was travelling eastbound in a minivan when he crossed the centre line and struck a Chatham-Kent Medavie EMS ambulance travelling westbound.
Two on-duty paramedics, a 36-year-old Chatham woman and 46-year-old Chatham man were in the ambulance. No patients were on board at the time.
The female driver of the ambulance was transported to Hotel-Dieu Grace Hospital in Windsor with serious lower body injuries. The male passenger was sent to the Chatham-Kent Health Alliance with minor injuries.
Simpson was the only occupant in the minivan. He was transported to the London Health Sciences Centre via Ornge air ambulance with life-threatening injuries. He was in critical, but stable condition.
He has been released pending a future court date.
