In an article, or a quote from an article, on this thread, it was stated that one of the grounds for revoking Ricci's parole was failure to complete drug treatment/testing as ordered. The ONLY reason he would have made this failure would have been if he was using drugs.
Here's the quote from the article posted by Utah Girl (# 38). "Treatment program" is not clearly defined as to whether it was for alcohol or drug abuse. The only indication of drug abuse is based upon old prison records. Short answer.......no, based upon this source, there is no indication of Ricci using drugs (other than alcohol) since his release from prison in September, 2000.