I'm a game developer working on a fairly well known MMORPG in where I live. Recently, I've accidentally discovered that our DBA is banning players and forging player chat logs on his accord. For what reason, I do not know why.
The thing is, I don't have any conclusive evidence to present, and I've only started working here 3 months ago. On the other hand, the DBA has been here for 8 years so there's no question who they will believe if I ever brought it up to HR. To make the matters worse, the higher ups often speak pretty highly of him, so I have a feeling he's close to being indispensable.
For the past few months, we've also been getting complaints about players being banned for things they have not said so I have a hunch our DBA has been doing this for sometime, but it could be a coincidence. Regardless, I'm pretty bothered by this because who knows what this person could possibly do.
How should I handle this situation?