god, I need some help...

[Weebeast]

my question is what do i need to do to either get him to stop, or alert the police to this so that he will stop when he gets in such a huge amount of trouble? .

You remind me of my mother. At around 15 I was using drugs and my mom sent me to drug rehab center. I got out and started using again. What a waste of money and time that was. I was almost 20 when I graduated high school. Just be careful with the reckless intervention even if your intention is good. Hitting rock-bottom too hard your friend might not stand back up. One day I finally got tired and quit. Start imposing rules like no-smoking in your car. It will help to make him smoke less. I'm drug free now but still smoke. I just gradually add more silly rules in my life like not smoking inside my apartment. A Pack of Marlboro lasts for 2 and a half days now with cold weather and all.