sneek up and knife him from behind for fun).

Get his gun and use the scope to find all the
camers (you will want to turn the alternate
fire key to "right click") (this way u can
use the scope by clicking "right click" and
use page up or down to zoom in and out).

Then simply track down the cameras and one
shot from the sniper rifle should blow them up


This way you only have to go back into the
room were you turned off the camers first time,
do it again and go around shooting them with
any other gun to blow them up.