Cicero, the Arizona paper did a series on it. She did steal the drugs from the charity she ran. She also had a doctor who worked for the charity write narcotic prescriptions for her using the names of other employees. The doctor lost his license. Cindy got a sweet deal--one of those "diversion" programs instead of a long prison term that a lot of people would have received for such crimes.
I think Cindy got that sweet deal because McCain agreed to do some favors for bill clinton in return. I didn’t read everything on it, but I saw several articles posted here at the time.