No. He was alive upon arrival at the hospital. He was in cardiac arrest.
So, he was not already dead when he was plowed over by DT.
ETA link:
http://www.nytimes.com/2013/04/20/us/boston-marathon-bombings.html?pagewanted=all&_r=0
He said that he arrived about 1:10 a.m. Fifteen minutes later, an ambulance carrying Tamerlan Tsarnaev pulled up. He was handcuffed, unconscious, and in cardiac arrest, Dr. Schoenfeld said.
As a throng of police officers looked on, Dr. Schoenfeld and a team of other trauma doctors and nurses began to perform CPR.
There was talk before the patient arrived about whether or not it was a suspect, Dr. Schoenfeld said. But ultimately it doesnt matter who it is, because were going to work as hard as we can for any patient who comes through our door and then sort it out after. Because youre never going to know until the dust settles who it is.
The trauma team put a breathing tube in the patients throat, Dr. Schoenfeld said, then cut open his chest to see if blood or other fluid was collecting around his heart. His handcuffs were removed at some point during the resuscitation attempt, he said, because when the patient is in cardiac arrest and were doing all these procedures, we need to be able to move their arms around.
The team was unable to resuscitate him, and pronounced him dead at 1:35 a.m. Only as they prepared to turn the body over to the police did Dr. Schoenfeld look closely at the patients face and see that he resembled one of the suspects whose pictures had been released by the F.B.I. hours earlier. We all obviously had some suspicion given the really large police presence, he said, but we didnt have a clear identification from the police.
