I suspect most people at the club, possibly Arteta included, have not seen the information related to the allegations that was shared on social media. I've no doubt the legal team were all over it and I would not be surprised if Arteta removed himself from that and left it in the hands of those who need to know the details.
From a player's perspective, I suspect they also live under a constant pressure of, or at least be mindful of, people trying to take advantage of their position and wealth, and likely view things like this through that prism when they arise.