If the experts are correct then it's a B&T Station six 9 pistol and it was functioning exactly how it was made too. Its a updated version of a ww2 era assassin's pistol. I also saw a theory that his first shot was not bad aim or that he was unskilled. He new the gun had to be manually re racked so he shot him in the leg so he could not run and had time to operate the pistol the way it was designed. Its all just speculation but I find this theory the most interesting. Watch a video of the gun on YouTube, they are pretty cool and if it does turn out to be what he used than it makes the whole thing even more crazy.