Claim: The main character of Memento uses tattoos to track information.
Evidence: Pearce stars as a man who , as a result of a past trauma , suffers from anterograde amnesia , the inability to form new memories and suffers short-term memory loss approximately every five minutes.
He is searching for the persons who attacked him and killed his wife , using an intricate system of Polaroid photographs and tattoos to track information he can not remember.