B. Riley Financial offices in Westwood in 2024. (Jason Armond / Los Angeles Times) The hedge fund investor at the heart of a scandal that damaged B. Riley Financial has been charged with criminal fraud as the West L.A. company continues efforts to dig out from under the debacle. Brian Kahn, 52, who led a disastrous management buyout of a retail holding company partly financed with $600 million in B. Riley debt, has been charged with conspiracy to commit securities fraud in a related case, according to a ...