Identification is a primary need of societies. It is even more central in law enforcement. In the history of crime, a dialectics takes place between felonious attempts at concealing, disguising, or forging identities and societal efforts at unmasking the impostures. Semiotics offers specialistic skills at studying the signs of societal detection and identification, including those of forensics and criminology. In human history, no sign more than the face is attached a value of personal identity. Yet, modern forensics realizes that the (...) face can mislead and, inspired by eastern models, adopts fingerprinting. In the digital era, however, fingerprinting first goes digital, then it is increasingly replaced by facial recognition. The face is back in digital AI forensics, together with a tangle of sociocultural biases. Semiotics can play a key role in studying their surreptitious influence. (shrink)