Google Hostile Work Environment.

Document EVERYTHING on paper. And especially document when you go to your superiors about issues with this man. Do not leave complaints to verbal or even e-mail. Write them all down and turn them into your supervisor or your supervisor's supervisor.

This man sounds out of control and your employer has an obligation to do something about the situation. In fact, it sounds like it's probably gotten to the point where your workplace is NEGLIGENT with regards to the situation, potentially making them liable for lots of $$$$$$$$ in damages. Especially if they let this man walk out of a meeting where he was being reprimanded and then face zero consequences.

If you just want him gone, you can probably show the company that they are being hideously foolish in keeping this man employed, potentially making themselves complicit in sexual harassment.

If you are really pissed at the company, talk to a lawyer.