Officer Ronald Sheffield, aged 36, was tragically killed on September 21, 2001, while on duty at the McNamara Federal Building in Detroit, Michigan. Sheffield, a Federal Protective Service officer and a U.S. Marine Corps veteran, was responding to a call about a man with a gun at the building's metal detectors. The building's security had been heightened significantly following the terrorist attacks on September 11, 2001.
The assailant, David Sera, had been waiting in line to go through
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