405 ILCS 5/4-404

(405 ILCS 5/4-404) (from Ch. 91 1/2, par. 4-404) Sec. 4-404. A peace officer may take a person into custody and transport him to a facility when, as a result of his personal observation, the peace officer has reasonable grounds to believe that the person meets the standard for emergency admission. Upon arrival at the facility, the peace officer shall complete a petition for emergency admission. (Source: P.A. 80-1414.)