Officer Mumford was struck and killed by a truck with extended mirrors while conducting a traffic stop on Hayes Street, NE.
The driver of the truck attempted to pass him as he stood in the road. The officer was struck by the truck's mirror which caused him to spin around. Then, he was struck a second time by the rear of the truck.
Officer Mumford had been employed with the Metropolitan Police Department for 13 years, and is survived by his wife and two children.