Terrifying video shows an elderly man pointing a gun at an Uber driver before fatally shooting her. William Brock tells 911 that he shot the Uber driver because he had just been threatened on the phone by a total stranger and thought the driver and caller were working together. Brock said that the scammer ordered Brock to pay $12,000 or else. Cops say at the same time Loletha Hall, unaware of the circumstances, was instructed through the Uber app to pick up a package from Brock's home. Brock was charged with murder and has pleaded not guilty. Inside Edition’s Les Trent has more.