14 is a young age to be a frequent coke/meth user. Removing him from his current environment can be a good idea but it can also cause him to be more rebellious and reckless not to mention san francisco is far from being a drug abstinence city. If anything, drugs and people who use them will be more accessible to him in san francisco than milpitas. The only way to be sure he's not using coke/meth is to test him regularly. I mean, a coke user is being forced to move to a new city, with even more coke users & sellers, who do you think he's going to become friends with?