A prosecutor for the prosecution or a witness on behalf of the prosecution in a proceeding under this Act shall not be compelled—
(a) to disclose the fact that the prosecutor or witness received information or the nature of such information or the name of a person who gave such information; or
(b) where the prosecutor or witness is a police officer or an officer of the department—to produce a report or document made or received by the prosecutor or witness in his or her official capacity or containing confidential information or to make a statement in relation thereto.