Suppose that, instead of an out-of-uniform police officer and his son being in the parking lot when the teenagers arrived, Sally, a parking attendant hired by the store, was in the parking lot being picked up by her daughter. When Sally asked the teenagers to quiet down they assaulted her. Sally's daughter dashed into the store to request that the clerk call the police. The clerk refused and would not let the daughter use the store phone to place the call herself. The daughter then went back out to the parking lot and asked a store customer to call the police using his cell phone. The customer also refused to help. Sally sued the store and the customer.