Conflict with management at work?

• asg security
• work order software
• san francisco fire credit union

I am a security Supervisor and work at a warehouse. The warehouse manager is using his bagde to let drivers in. Driver were not properly processed so its a security breach. The warehouse manager is known to fire gaurds for small things. So i report it to the security vice president and he wants me to question him amd treat it as suspicous. Problem with that is im scared the warehouse manager can fire me for gettin on his bad side.

Conflict with management at work?