Officer William “Billy” Evans, who had served 18 years in the department. Evans was killed when a man rammed a car into two officers at a barricade outside the U.S. Capitol on April 2. (U.S. Capitol Police/AP)

On Friday afternoon, hours after U.S. Capitol police officer William “Billy” Evans, was killed in the line of duty, two of his fellow officers pulled into the quiet suburban Virginia neighborhood where he was often seen with his children.

They began unloading several plastic bags of supplies — including snacks and a rack of blue Gatorade — from the back of their black SUV and carrying the haul into Evans’s house, stepping across a tidy, grassy garden with two turquoise lawn chairs, angled slightly toward each other. Neighbors stepped from an adjacent home conferred in soft voices with the officers, asking what else was needed and how they could help.