car ramrod

Hi I am running my own private server with a large community and have just let a large group in, however some suspicious activity has occurred from some of the groups members. My group have a camp and a helicopter in different places, and when logging on we discovered this group looting our camp in our helicopter. Firstly there was already two corpses in our camp, we engaged the surviving members killing them all. Our v3s at the time was floating about 10m off the ground then dropped to the ground and a dead survivor dropped out (we didnt kill him). We regrouped and about an hour later while moving camp we took fire from a .50 cal rifle but we received no damage, and the shooter seemed to vanish. While searching for the shooter we found an unarmed survivor in the trees about 500m away from camp, he acted like an ai moving his head side to side, we killed him but there was no death message, we inspected the body and it said the mans name was Unknown and was killed by unknown or something along those lines. There is nobody in our server with the name Unknown and he didnt react to us at all. This is when we thought something suspicious was going on. We hid our chopper in a different location which they found about 15mins later. We checked the script logs and found an unusual script executed by one of the members of there group. This script: #140 dummy"]; _dummy = [_this,"players"] execVM "\ca\ui\scripts\dedicatedServerInterface.sqf"; Are they scripting/hacking? Any help would be appreciated Thanks

Thanks for the reply, do you know anything about the other strange happenings?