745 ILCS 10/6-107

(a) Neither a local public entity nor a public employee acting within the scope of his employment is liable for any injury resulting from determining in accordance with any applicable enactment:

(1) Whether to confine a person for mental illness or addiction.

(2) The terms and conditions of confinement for mental illness or addiction in a medical facility operated or maintained by a local public entity.

(3) Whether to parole or release a person from confinement for mental illness or addiction in a medical facility operated or maintained by a local public entity.

A public employee is not liable for carrying out a determination described in this subdivision (a).

(b) Nothing in this Section exonerates a public employee from liability for false arrest or false imprisonment.