Answer: rifler

AnswerCrossword Clue
RIFLERRansacker
RIFLERThief
RIFLEROne looking through drawers
RIFLERPlunderer.
RIFLEROne going through papers in a safe, say
RIFLEROne rummaging
RIFLERRobber, e.g.
riflerone who rifles (to search through and rob)
riflerengage in ransacking and stealing
riflerto ransack especially with the intent to steal
riflersteal and carry away