I met Bill once, in the mid-1980's, observed his 'non-violent self-defense' class. Truth be told, it was effective 'violent self-defense.' Good tai-sabaki to deflect and get to the best angle (deflections and strikes based on Wing Chun, he said) and into a hadakajime - old style, palm to palm, pull backwards so the person lost their balance and all the pressure was on the carotid AND the vertebrae. Most of his students, beginners from the mental health field were doing pure trachea bar-chokes.
We went out afterwards to eat, and talked for a few hours. We touched on the Kodokan (I'd trained there a little), and he proudly told me about some well-known non-Japanese (I honestly have forgotten his name) who called Trevor Leggett "an old fag" and Bill proudly told me that he threw the guy through a plate glass window.
We went out to dinner - and yes, he was proudly 'out' as a gay man - I don't know most of the people on this site, so I don't know what image that puts in your brain, but I would describe him as a very intelligent massively built thug who liked guys. Absolutely professional on the mat. Very left politically (again, don't care much about the reader's politics - his were very different from mine, but this was the main part of who he was - he lived his principles, and his martial arts, in his view, fueled and gave power to what he was fighting for).
NOTE: To add to this, since I wasn't there, so call this one a legend, to be debunked or not. Another old-time California judoka told me that Bill lost his spot as a competitor in the Olympic trials when the guy we was fighting kept 'accidentally' slugging him in the chin in 'failed' seioinage entries, and Bill got tired of it and decked the guy with a hook - and was disqualified.