2000-2013 thriller film with albino antagonist and a handful of torture scenes

I don’t remember a lot about the film other than there being an albino villain, a lot of torture scenes, a torture scene that takes place in a sewer or some where underground and a scene where a man gets one or more fingers bitten off by a mutant alligator man. I also remember the box art on the DVD case having some one wearing a gas mask or multiple people wearing gas masks. I rented the film from my local pawn shop about 4-5 years ago and barely watched it because I couldn’t understand what was going on. I can’t find it any where and have been searching for a while.