I don't think there is..

u can't get past him? i think since you ask glitches,,,
u should start with taking the noob tube ( Grenade launcher) and spam him.
then get the VC9 Missile launcher to kick some ass. after all use the sniper , wait for a weird thing to pop out thru the window grab a shotgun soon as possible he will be using a turret or try to knife you

Yeah why you ask? He is pretty hard to kill but eventually he'll die. Just stay near your partner