In this article, we try to contribute to the new discipline Forensic Semiotics – a discipline introduced by the Canadian polymath Marcel Danesi. We focus on clues as information and criminal investigative processes as inferential. These inferential (and Peircean) processes have a certain complexity consisting of the interrelation between the collateral observations of the investigator, e. g., his background knowledge concerning criminal and technical analysis, the context that the investigator acts within or in relation to (the universe of discourse), e. g., the scene of crime or the criminal law, as well as the clues as information that will cause the inferential processes in the first place. We believe that this focus can tell us something about crime solving that is not just sensitive to epistemological factors (how to know), but also ontological (what to know) and normative factors as well (how to value the processes of crime solving).