Shooting without any valid reason

I was not recording when it happened but I started just after you can see the gun in his hand

I was sent to jail for RDM What happened that i was a recruit in NG it was just my 2nd hour and there was people trying to enter the base and while i was gurding the south gate i saw a bus full of people so i didint now what i have to do i shot the driver and then i took cover and started...