components of employment discrimination laws and how

Suppose you are a plant manager and one of your team members, John Smiths, is facing problems controlling his anger. He is experiencing wide swings in emotions due to his bipolar disorder, which is a medical condition- You are aware that John has been under the treatment of a psychiatrist- He recently threatened other employees with Violence, which forced you to place him on leave until the psychiatrist indicates that his emotional condition has stabilized- Can John use the ADA to seek a reasonable accommodation and get reinstated to the same job or a modified one? If you need further information to assess this issue, what information would that be?