Police Commissioner Robert Saltzman, for years the most critical voice on the civilian panel overseeing the LAPD, has ended his term. For almost a decade Saltzman fought to make the Los Angeles police more transparent, and improve its relationships with black, Latino and gay citizens. He leaves at a heated time, when the LAPD is under fire from activists protesting officer-involved shootings of black residents, and amid a national debate over race and policing.