Stephen lost his job Saturday after Oak Brook fire and police commissioners ruled he failed to disclose information about the disappearance of his father's fourth wife, Stacy Peterson.
Drew told the "Herald News" he was not trying to thwart the investigation when he gave Stephen three guns after Stacy's disappearance.
Drew is a suspect in Stacy's disappearance. He is charged in the murder of his third wife, Kathleen Savio.
