Quick backstory. My brother recently had a divorce after 16 years of marriage to his wife and the mother of his two daughters. She had a male friend who she claimed was “one of the girls” and who also was employed under her I will refer to him as S. She is part of HR. The male friend, S was dating a coworker and after they had a nasty split with accusations of DV my brother's wife decided she would start a relationship with S and fix him. Hence the divorce. S was later fired for reasons not involving anything already mentioned but my brother's ex was and is giving S inside information on a pending lawsuit he has with her company.
Fast forward four months to last Friday. My brother's daughter comes to her dad and says she didn't know if she should say anything but there is something he should know. S had applied and went to an interview with the company that my brother works for. He goes into work and talks to management on Monday and tells them what is going on and how they knew he worked there and that he thinks this guy is trying to mess with him and cause more problems. They say there is nothing that can be done because they already sent a letter to S saying he was hired. HR's advice is to just stay away from him. This is not a huge company and staying away from someone is damn near impossible.
Is there anything that can be done? My brother is a total wreck. This man has already been going out of his way to make up horrific untrue rumors about him to his and his exes mutual friends and family members trying to make himself look like less of an asshole. He was a coworker, friend and the family photographer and he totally wrecked a family now he's going after my brother's job. Today will be the first day for S on the job. If you know any info to help it would be greatly appreciated.