(720 ILCS 5/7-9)
(from Ch. 38, par. 7-9)
force to prevent escape.
(a) A peace officer or other person who has an arrested person in his
custody is justified in the use of such force to prevent the escape of the
arrested person from custody as he would be justified in using if he were
arresting such person.
(b) A guard or other peace officer is justified in the use of force,
including force likely to cause death or great bodily harm, which he
reasonably believes to be necessary to prevent the escape from a penal
institution of a person whom the officer reasonably believes to be lawfully
detained in such institution under sentence for an offense or awaiting
trial or commitment for an offense.
(Source: Laws 1961, p. 1983.)