Corrected entry: When Clive the mastermind blacks out the cameras, the detectives say later that there was a blackout period of only a couple of minutes with no footage of anyone entering or leaving. That means the from the footage just before the robbery you could ascertain who was in the bank and who are the robbers, or if nothing else narrow down the pool, simply by eliminating anyone in the bank already. (00:05:00 - 00:28:00)
Friso94
9th Jan 2019
Correction: That is assuming that the bank robbers didn't have anyone inside the bank already, which they did. There were only four people in the van at the start, and also four at the very end in the car while they're waiting for Clive Owen, making him the fifth.
Friso94