Illinois Statutes Chapter 725. Criminal Procedure § 5/107-14. Temporary questioning without arrest

(a) A peace officer, after having identified himself as a peace officer, may stop any person in a public place for a reasonable period of time when the officer reasonably infers from the circumstances that the person is committing, is about to commit or has committed an offense as defined in Section 102-15 of this Code, and may demand the name and address of the person and an explanation of his actions. Such detention and temporary questioning will be conducted in the vicinity of where the person was stopped.

(b) Upon completion of any stop under subsection (a) involving a frisk or search, and unless impractical, impossible, or under exigent circumstances, the officer shall provide the person with a stop receipt which provides the reason for the stop and contains the officer's name and badge number. This subsection (b) does not apply to searches or inspections for compliance with the Fish and Aquatic Life Code, the Wildlife Code, the Herptiles-Herps Act, or searches or inspections for routine security screenings at facilities or events. For the purposes of this subsection (b), “badge” means an officer's department issued identification number associated with his or her position as a police officer with that department.