Tattoo Recognition Technology (TRT) offers a wealth of information that can be used by law enforcement: identifying a person or corpse where traditional tools such as facial features or fingerprints are unsuitable. They can also provide useful information, such as gang affiliation, religious beliefs, prior convictions, and years spent in jail. However, TRT also raises a host of legal issues including privacy concerns, the law of search and seizure, freedoms of expression and religion, racial profiling, and the Fifth Amendment.