The wife of a man in a physically abusive marriage comes to his place of employment after he has attempted to leave the relationship. One of the man's co-workers meets the wife as she storms the front door of the office building where the man works. The co-worker is aware of the abusive relationship and attempts to prevent the woman from entering the building. The wife shoots the co-worker in the foot and he suffers serious physical injury.

Is the employer or employee responsible for the injury? Secondly, please provide the language of a written workplace policy that is believed to prevent future occurrences of the event that led to the injury described in the above.