Legal Question in Employment Law in Missouri

It depends. In Missouri an employer can terminated an employee for "an arbitrary or capricious" reason. Missouri is an "at-will" state and employers can literally terminate employees for nearly any reason.

A wrongful termination suit would really only be sustainable if it can be proved that the termination was a result of some form of discrimination (racial, gender, disability, etc.). There is a four/five prong test given by the Supreme Court called the McDonnell Douglas test to determine if the termination (or any adverse employment action) is a result of, or a pretext for, discrimination.

As far as the other incidents, it depends heavily on the factual circumstances of the incidents.