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A newspaper photo of Duley identified her credential as BSW, CSC-AD.
http://www.fredericknewspost.com/sections/news/display.htm?storyID=76901
If it's the same Jean Duley, as of 7/07, she was noted to have made the Dean’s List (!) at Hood College.
A recent BSW would have no clinical significance whatever. A Maryland CSC-AD (addiction counseling) requires only an Associate degree (2 years college) in HHS field plus 15 credits in addiction counseling and 2 years supervised experience (1/2 of which may be accomplished while earning Associate degree) to sit for certification exam. She might have made that if she started before or during college.
While histories of substance abuse don't rule out becoming addiction counselors (indeed, the field is loaded with such people) they have to be in recovery and court records indicate Duley isn't.
In CA, as long as they are clean - and they do have to test frequently during their training - they actually prefer recovering addicts for the programs. The clients tend to respect them more because "they have been through it too" but they must demonstrate a long period of sobriety and they do test them as part of the licensing procedure. In other states, who knows? Licensing procedures vary from state to state. In some states it used to be that anyone could put up a shingle and call themselves a "counselor" - and not necessarily a drug counselor. Same with PI licensing. You can go to some states and just get business cards. Voila! You are Sam Spade.