A hospital patient still had an IV in his arm and was wearing his medical gown when he stole an ambulance from a Virginia hospital, police said. Now, law enforcement is searching for the 32-year-old man. The man was receiving treatment at Fairfax Hospital on Monday after he was in a car crash on Interstate 66 earlier that day, the Fairfax County Police Department said in a news release. He was a passenger in a car that police say was stolen. The driver fled officers but lost control of the vehicle, according to police. The car hit a hill and went airborne, then it landed against a concrete wal…