There are 2 types of creepy guys not only if it attacks any gang but it only attacks you, try to stay alive and get backup, their unstoppable!

Press SPACEBAR + CTRL to spawn Creepy Guys 1 Male
Press SPACEBAR + SHIFT to spawn Creepy Guys 1 Male (invincible)
Press SPACEBAR + \ to spawn Creepy Guys 2 Female
Press SPACEBAR + BACKSPACE to spawn Creepy Guys 2 Female (invincible)

Bouns:

Press SPACEBAR + 1 to spawn a bum (It never kill the player or gangs, but he kills the police when they fire including mission gangs)