Not too long ago, I visited the RPD police museum and head about this riot from a retired officer who was there. Wild stuff —
Check out this article from Richmond Magazine in 2011:
"Richmond, being Richmond, was visited with 1960s tumult not quite when it was happening in other places, but in the early 1970s. The newly formed Virginia Commonwealth University, with its growing number of liberal-arts students, was changing the city. Events built to a head and climaxed with the Cherry Blossom Music Festival Riot of 1974. "