the-bat-mk-16
The-Bat-MK-16
the-bat-mk-16

I personally think it is Bruce using the Toxin. First reason: The toxin was easy to obtain. At the start of the game, Bruce had a raw sample of the toxin. He couldve easily synthesized more in the Batcave. Second Reason: Theres no one else able to take up the role. Azrael is fighting the Order of St. Dumas, Tim is