TMZ Investigates: What Really Happened to Richard Simmons?

What really happened to Richard Simmons? There are many theories -- his housekeeper is holding him hostage, his beloved dog died and left him devastated, he had medical problems that made it too difficult to continue working, he was burnt out listening to other people's problems, and he was transitioning to become a woman. Some of these are absolutely false, and others explain what really happened to him. TMZ combed thru the facts and spoke to the people close with him. In the end, we have an answer – why Richard just disappeared.