Two years ago I started working at a local hospital. After just 6 months I was given the lead tech position. Well that caused a lot of problems for me with the other tech's that have been there a lot longer. The worst was from this black tech that started a rumor around the hospital that I was member of the KKK and that I hated all blacks and hispanics. I am white. Now I have staff member from all departments trying to cause problems for me, name calling and even threats of bodily harm. I approached my manager about this and he just laughed and said that he would never do anything like that. What recourse do I have to stop this action? I do not want to leave my job.
Is this a criminal offense? I hope someone can advise me. I live in Orlando. Florida.

