Los Angeles' political and community leaders were stunned by the corruption indictment handed down Wednesday against Mark Ridley-Thomas, one of the city's best-known and longest-serving officials. Ridley-Thomas is accused of conspiring with Marilyn Louise Flynn, who at the time was dean of USC’s School of Social Work, to steer county money to the university in return for admitting his son Sebastian into the graduate school with a full-tuition scholarship and a paid professorship. Ridley-Thomas was on the Los Angeles County Board of Supervisors at the time... ...Ridley-Thomas, 66, is the third L.A. City Council member to face federal corruption charges...