Forgot to add: I also knew he wasn't selling because we were always together and especially lately he was always at home trying to stay occupied with other things... He was making an effort to get clean. I guess ordering it was like a last minute freak out about quitting and going through the pain of recovery. But like everyone says, there's not really much logic to an addicts actions sometimes.
His using was due to depression and loneliness and running into old friends at the wrong time and reconnecting.. He was never into any other criminal activity and remained a standup guy. Cut off all his old friends and contacts a while ago. Has just been struggling with personal use and thinking he can get clean on his own. Maybe this will finally be a wake up call for him to get professional help and stop thinking he can control his own addiction.