Originally posted by WizBang75
And I first thought this because the Pentagon Theif says: "Mine!" when he steals your guns, which demonstrates a sense of possession towards the weapons.
But he can't be because the 1st Hell Hound Killed him when Dr. Richtofen locked him and Samantha in the Teleporter Room.
Although....element 115 may have resurected him? Hmmmm....
Hellhounds ARE, in fact, zombies. So the Hellhound could have "killed" him, and had him reborn as a zombie.