If he'd been charged with possession of drug paraphernalia, it would have been reported. If he had not been charged with it, the media would have stayed away from it. Maybe they'd have feared a defamation lawsuit--b/c if he wasn't charged with it, they would have feared that was just a rumor.
It's also possible that he didn't want his WIFE to know that he was using. Might lose that nice roof over his head, and that attractive woman who spoke up for him all the time. He was going to need her even more when he was in prison. Cons always fare lots better if they've got someone on the outside who will do their bidding and send them money.