Something is just not right about that scene. The photographers seem to have had several seconds to position themselves to take pictures while both the officer on the bike and the one standing do not seem concerned about the man.
Further, if the run over man has already been there several seconds as indicated by the time it would take for the photographers to align themselves, wouldn't instinct take over and he would have pulled himself away from the bike using his hands as leverage? Instead he is clutching a camera that may still be aimed at the cop.
There is another picture and you can see that the motorcycle cops were stationary and seem like they were there to block access to the road
I'd say this was a contrived photo op which was successfully executed and the press has willing gone along with the lie.