with 0 evidence I don't think anything can be done. I guess chat logs can be found to see what was said in OOC but without a video showing anything I doubt this will be accepted.
For future reference, ALWAYS try to record things if possible, especially when you're reporting a staff member.
There is a section of this thread here:
zarpgaming.com/index.php/forum/darkrp/10...p-information-thread
on how to collect video evidence properly.