Question: Facts: - appointer: george h. w. bush - signature: vaughn r walker signature.png - birth name: vaughn richard walker - successor: james ware yvonne gonzalez rogers - predecessor: marilyn patel spencer williams - office: chief the northern district of california judge of the united states judge district court for the northern district of california of the united states district court for - term end: december 31 , 2010 february 28 , 2011 - term start: october 30 , 2004 november 27 , 1989 - birth date: 1944 - name: vaughn walker - image: judge in background.jpg vaughn walker photo in lobby with san francisco - birth place: watseka , illinois , u.s. - alma mater: university of michigan , ann arbor stanford university Based on these bullet points, write a short biography describing the life of vaughn walker .
Answer:
vaughn richard walker -lrb- born 1944 -rrb- served as a district judge in the united states district court for the northern district of california from 1989 to 2011 .walker presided over the original trial in '' hollingsworth v. perry '' , where he found california 's proposition 8 to be unconstitutional .