Memorial plaque for fallen Philadelphia Officer Charles Knox stolen
Charles Knox, 31, was shot and killed the night of Aug. 30, 1992, while responding to an armed robbery at a Roy Rogers restaurant at South Broad Street and Snyder Avenue.

Charles Knox, 31, was shot and killed the night of Aug. 30, 1992, while responding to an armed robbery at a Roy Rogers restaurant at South Broad Street and Snyder Avenue.