820 ILCS 275/15: Employer's right to a workplace protection restraining order.

An employer may seek a workplace protection restraining order to prohibit further violence or threats of violence by the respondent if:

(1) an employee has suffered unlawful violence and the respondent has made a credible threat of violence to be carried out at the employee's workplace;

(2) an employee believes that the respondent has made a credible threat of violence to be carried out at the employee's workplace; or

(3) an unlawful act of violence has been carried out at the workplace or the respondent has made a credible threat of violence at the workplace.