IDKC

The title basically explains everything. I recently got back into playing the arma 2 campaign, and as of now i'm on manhattan, but there's one big problem i'm having; when i'm driving around in my humvee my character will randomly tell the gunner to shoot at anything close. It started out with sheep and cows, but during the mission he all of a sudden targeted a civilian and later on a cdf officer which made everyone turn on me. I really don't know what's going on or how to fix it and would appreciate any help.