I think that the first thing that you should do is to speak with the doctor whose license he is abusing.  The doctor is at risk for being called on the carpet.  Next, there is a state agency that licenses LPN's.  Contact them to report the actions here.  You need to also contact the State Attorney General's Office as well as possibly the state Department of Insurance. It is insurance fraud as well if the parties for whom the prescriptions were written used their insurance to pay for them.  Finally, contact your local District Attorney or County Prosecutor as well.  This is really a very big deal here and you need to address it quickly and from all ends.  Good luck.