Innocent until proven guilty - if he's charged he'll have his day in court in front of twelve men fair and true. They will decide if he is guilty or not. We as Saints supports need to support him. As to his head being right - after all the hub hub he'll probably look forward to getting out and kicking a ball.
Do not drop RL - his confidence isn't what it was last season but if you drop him now you will dent his confidence further - stick with him and he will start banging them in regularly IMHO.