Eva Braun reckoned Hitler was a sweetheart...
Actually, that was facetious, but in all honesty, the point holds. You have had a smooth transaction with this man, and I'm glad that you didn't get into the trouble so many other people have. However, it's rather like you meeting a serial killer on a good day....he let you live, but it doesn't stop him being a serial killer.
As with any legal case, it's all about weight of evidence, and the experiences of many, many dealers, and many, many innocent individuals tell the tale that this man is seriously screwed-up.
Just look at the sickening e-mails he sent to people who simply posted on the previous 'miami comics' thread.