Purple,
I am sorry to hear about your situation and I feel your pain. If I were you, I would play this one smart. Go to radio shack, get you a simple phone tap for your phone, and talk with him on the phone about the details in a calm manner as not to get him stirred up... Let him give an admittance to this on the phone (on the tape). As soon as you have it on tape, you got him by the balls, stealing narcotics is a big crime; at that point it would be a rather fun game of "Lets make a deal" and you would be calling all of the shots, if you know what I mean.

Take care,
If you need any help, pm me,
-cadman