[Wolf]

For whatever reason, bots are omniscient as long as you have an unsuppressed gun, even if you have never fired a shot. You can be sneaking around in socks on carpet and as long as you don't have a suppressor, bots will magically know where you are. You can see this in action when your teammate is one floor below or above and you walk into a room with a bunch of bots staring at the floor or ceiling. Sticking a suppressor kind of turns them into lobotomites.

[gnif]

I found the same except if you don't hit ALT to walk slowly they will still detect you once you're close. There are several on the precinct level that if you do this you can catch them in their spawn facing a corner or a wall.