JUSTICE IS SERVED: A video captured the horrifying moment a masked gunman threatens the life of a taxi driver... and the swift justice served by nearby police. In the clip, a gunman threatens the driver to hand over his wallet. The driver understandably pleads for his life. Fortunately, Berks County (Pennsylvania) deputy Sheriff shows up and arrests the criminal. Where was the Sheriff? You can spot the police vehicle in the background throughout the clip.