Sixties Project has a not-very-good pic of burning bank poster that circulated in aftermath and I've seen references but no discussion on Sixties Project e-list http://lists.village.virginia.edu/Sixties/HTML_docs/Sixties.html
Dick Flacks and Jack Whalen wrote book, _Beyond the Barricades_, about ten years ago that uses incident to discuss what became of '60s generation' of activists and non-activists attending UC Santa Barbara in 1970 when bank burned. If memory serves, protest had begun in response to Chicago 7 (down from 8 after Bobby Seale's severance from trial) guilty verdict. Michael Hoover