You really should be talking to a lawyer. Usually, after a year, doctors will declare him no longer employable. He will normally be offered a permanent settlement, which may or may not involve continuing employment in some capacity. You certainly can't cut him off from compensation, if that is your intent.
The Equal Employment Opportunity Commission enforces many laws against inequality in the workplace. Some of these laws include: The Civil Rights Act of 1964 Age Discrimination Act of 1967 Title I Americans with Disabilities Act of 1990 The Pregnancy Discrimination Act Termination and Defamation Claims In addition to discrimination, discharged employees could claim that their former employer defamed them. A claim could involve that the employer made false, disparaging comments about them to coworkers or other parties or treated them in a manner intended to cause emotional distress. The employee may claim the employer invaded their privacy if they improperly disclose the reason for involuntary termination. In some cases, the employer may be charged with retaliation against a whistle-blower. They may claim they were terminated in retaliation for exercising a legal right, such as reporting discriminatory or other unlawful employment practices or for taking leave under the Family and Medical Leave Act or the Military Leave Act At-Will Employment Most states are considered at-will employment states.