1. A system for detecting electronic article surveillance marker shielding, the system comprising: an electronic article surveillance subsystem operable to detect electronic article surveillance markers within a detection zone; a metal detection subsystem including at least one transmitting antenna, the metal detection subsystem operable to detect a metallic object within the detection zone; a video analysis subsystem operable to capture at least one video image of the metallic object; and a system controller communicatively coupled to the electronic article surveillance subsystem, the metal detection subsystem and the video analysis subsystem, the system controller operable to: determine a first probable classification for the metallic object; calculate a confidence weight for the first probable classification; identify the metallic object as electronic article surveillance marker shielding according to the first probable classification and the corresponding confidence weight; and generate an alert.