Woah, alright im going to point out some discrepancies right here, (and maybe i dont have a say in this, but guess what? im going to state my opinion)
They were in a sim, a NULL claimed sim, okay, in sims, (if my administrative knowledge isn't outdated) You can spawn weapons for people inside the sim, if requested to do so, this is coming from someone that held countless sims and events. i doubt theres anything wrong with spawning a weapon inside of a sim. Was he killing anyone else inside the sim? besides the people he was in the channel with, i can tell you right now this happens all the time my friend, thats nothing. Now the RDM outside of the sim? it wasnt right, w.e. call a CG to arrest him. plain and simple. Not really any need for a staff abuse report when
1: the sim thing is invalid
2: In game killing can be handled by in game means (CG)