Officer Who Shot Oscar Grant Found Guilty of Manslaughter Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Wanda Johnson, the mother of Oscar J. Grant III, walks with supporters as they leave the Los Angeles Superior Court after the involuntary manslaughter verdict against former officer Johannes Mehserle. ( MARK RALSTON/AFP / Getty ) Produced by PRI and WNYC