A person who had been banned from entering the store was observed in the store. An employee (an off-duty police officer who works at the store) went to escort this person from the building. The person picked up a chair and struck the employee's head, then chased him while continually hitting him. The employee went to the ground and the person hit the employee's head with his fists. The employee was hospitalized with scalp lacerations requiring over 200 sutures and surgery. They also sustained two nondisplaced fractures to the right arm.