easy 2 beat them. heres a tut.
1) Find a gun. preferably and awp.
2) Camp in the shadows or a jail.
3) Wait.
4) once u see their head, or body, aim and shoot.
5) if u hit them they probly dead. maybe 2-3 shots.
lot harder with disturbed but u gotta kno how 2. he told me a way XD