See also Fourth Amendment (stop and identify statutes).
Stop and identify statutes often combine elements of traditional vagrancy laws with provisions intended to regulate police behavior in the course of investigatory stops. The statutes vary from State to State, but all permit an officer to ask or require a suspect to disclose his identity.
A few States model their statutes on the Uniform Arrest Act, a model code that permits an officer to stop a person reasonably suspected of committing a crime and 'demand of him his name, address, business abroad and whither he is going.' Warner, The Uniform Arrest Act, 28 Va. L. Rev. 315, 344 (1942). Other statutes are based on the text proposed by the American Law Institute as part of the Institute's Model Penal Code. See ALI, Model Penal Code, §250.6, Comment 4, pp. 392-393 (1980). The provision, originally designated §250.12, provides that a person who is loitering 'under circumstances which justify suspicion that he may be engaged or about to engage in crime commits a violation if he refuses the request of a peace officer that he identify himself and give a reasonably credible account of the lawfulness of his conduct and ...