Too Close
Well, are you sure you want a cop putting up flares where there might be explosive gasses leaking?
As for the rest, is he the first one responding? He can't be the only one, or who is taking the picture? An awful lot of assumptions there.
Personally, I think he's an idiot for going so close to such a volatile situation, but then again, if he is the first responder on scene, how does he know what's in the tanker until he gets close enough to see the tags? From the position of the photographer, for all we know the tanker could be full of milk!
Or is it standard procedure when arriving at a truck accident to stay far away and wait for suited personnel to arrive to check for survivors and assess the accident scene?
Hindsight is always 20-20.
Terry