Authorities initially claimed that only birdshot had been used as shotgun ammunition. When physicians provided "00" pellets removed from the wounded as evidence that buckshot had been used, Sheriff Frank Madigan of Alameda County justified the use of shotguns loaded with lethal buckshot by stating, "The choice was essentially this: to use shotguns—because we didn't have the available manpower—or retreat and abandon the City of Berkeley to the mob." Sheriff Madigan did admit, however, that some of his deputies (many of whom were Vietnam War veterans) had been overly aggressive in their pursuit of the protesters, acting "as though they were Viet Cong."