This guy is an idiot. Testing positive at master nats? His wife tested positive for the stimulant ephedra at (wait for it) master nationals around 2000-2001 time frame. And, if he's following his sport, he should know testers are looking for DHEA: Hamilton tested positive for it earlier this year. Hamilton. A guy who knows his way around a doping cycle. Keep that in mind.
DHEA isn't the drug Williams used to increase his performance. Hamilton either. It's only the one they got caught for. DHEA is most commonly used as a bridge between or immediately following a testosterone-/steroid-doping cycle when the body's ability to produce natural testosterone is depressed. When you see athletes testing positive for DHEA, androstendione, clomid, novadex and HCG they're bridging between cycles. This isn't Williams first rodeo. Google "post cycle therapy" or PCT.
Someone on the OBRA (Oregon Bicycle Racing Association) listserv stated that they could at least understand if he were racing as a professional. Williams did race professionally for but only a brief period in the early 90s. It seemed he could have raced pro but instead built a name for himself around the Northwest (States) for the past 20 years by beating up on whoever was left behind and, in the spirit of being a total pig, cherry picking the masters races too.
During that time he built a lucrative (relative to his previous job of sleeping on his girl friend's couch) coaching business. A lot of people suspected Williams of doping since he shied away from UCI races (Sea Otter, Redlands, etc.) where testing happened. If the guy wasn't such a jackass people might be willing to cut him some slack, but as it stands, there are so many who he beat and flipped off as being inferior that those people will come out of the woodwork on forums, listservs, blogs.