Why did Umbrella have never used Nemesis to kill every single zombie in Raccoon City? As much as I know, he was tested once, to kill all S.T.A.R.S. members, to test his "skills". But, never seen to kill any zombies. It is impossible that, umbrella was afraid, that he will be bit by a zombie, because:
- He was bitten already in first movie, when he was still alive
- He is somewhat of a Robot, (I guess, he can't feel pain)
- He has a bloody Gatling Machine-gun and rocket launcher.
P.S: Also, just wanted to know, where did he disappear after 2nd movie of Resident Evil?