Giant Food, Inc. v. Scherry

Appellant employed William Joyner as an armed security guard to protect its store located in the Blair Plaza Shopping Center in Silver Spring. On the evening of November 11, 1978, while on duty, Joyner observed a man brandish a pistol and rob one of appellant’s cashiers. He allowed the robber to leave the store, and began to pursue him across the parking lot.

As the robber reached a car parked at the far end of the lot, Joyner pulled his pistol and twice shouted to the man to stop, identifying himself as a police officer. The robber ignored the warnings, got into the car, and began to drive…