My question involves labor and employment law for the state of: Louisiana
I recently started my first job in management. Two of the employees I supervise have recently told me about several sexual harassment situations involving my supervisor's supervisor. The events occurred at various times within the past ten years. The events involve comments made to them about their dress, their looks, their sexual activities, and one even involved the promise of a raise if the employee would sit next to the supervisor at a company event. One of the events also involved partial exposure of private parts, and another involved sexual touching of a third employee (who is no longer employed with us) in a hotel room in front of one of my employees. The offending supervisor is an officer of the company. I asked if any of these events were reported, and I was told by employee #1 that she did tell HR and a friend of her's within the company. This friend worked closely with the CEO and relayed the info to him. His response was simply to tell the offender to stay away from her. She does not know what HR did with the information, but she felt that the HR manager (no longer employed with us) thought it was in her head. She also told the COO, who told her that they just needed to pray about it and started speaking in tongues. Employee #2 has relayed several of the same stories about employee #1 to me. She also has her own stories, which are mostly crude sexual jokes or comments about her dress. One of the crude jokes happened last week. Employee #2 has not reported much of anything to HR or anyone else besides myself. She has reported bullying behavior by the officer to the COO, who also told her they needed to pray about it.
I have read our company policy about reporting sexual harassment, and it tells the victim to report it to his/her supervisor, but it does not tell the supervisor what should be done. I am assuming I should take the complaints to my supervisor or to HR. Other than the one crude joke, all the events happened before I was ever employed there. I'm not sure if I should report them or not because they all happened before my time with the company. I plan on documenting this stuff over the next several days. From a legal standpoint, what else should I do? I just want my employees to be able to come to work without worrying about being harassed sexually or religiously.

