A few quirks i noticed while watching:
Following a Saw-ish theme/ style for plot?
The dialogue over the phone didn't sound very believable, he's a former hitman who lived off taking lives but has the mentality of a civilian whining about his rights? I did like how the smile over the mystery black man resembles the Joker though, very manic. And with the lighter flipping, kinda reminds me of them some japanese television show i watched. (But that's prolly just me i guess, haha)
The first guard who entered told mr former hitman to back up, which is supposed to distance himself from him. But he puts himself closer to mr former hitman instead?
Great job imo, i don't have a film to my credentials so i'm really in no position to critique- But i think your cinematography skills (or whoever did it) can make some television dramas weep and look really bad. (although they have been getting better)
"You don't recognize me? Nevermind." LOVED THAT!