my wife is being bullied at work and they have made many false accusations about her and she has been written up for this. they have not investigated

You don't mention if your wife is being bullied by a supervisor or co-worker. If co-worker, it is important that she report the incidents to her supervisor, and if her supervisor is unwilling to document the complaints or remedy the situation, she should keep record of them herself. If your wife is being targeted based on her race, gender, age, religion or various other categories, the behavior may be actionable under State or Federal discrimination laws. Even if she is not in a category considered a "protected class", she may still have an action against her employer, if the behavior is extremely outrageous, for intentional infliction of emotional distress.