Interstate Identification Index Law and Legal Definition

The interstate identification index is a national index that stores criminal histories of offenders in the U.S. This system is compiled and maintained by the U.S. Federal Bureau of Investigation (FBI). It is also known as III (triple-eye).

The III includes details of individuals who have been arrested or indicted for serious criminal offense anywhere in the U.S. This index has search options to get a list of states that have criminal history on a given person. An investigator or analyst can then get the specific criminal history of the person by contacting those states either through the National Law Enforcement Telecommunications System (NLETS) or by other means.