By Post Staff On an overcast day with moments of sunlight, family members and supporters of the late Oscar Grant III gathered in front of Oakland City Hall on Saturday, February 26 to celebrate his life and legacy. Grant was shot at the Fruitvale Station platform on Jan. 1, 2009, by BART officer Johannes Mehserle, | By Post Staff On an overcast day with moments of sunlight, family members and supporters of the late Oscar Grant III gathered in front of Oakland City Hall on Saturday, February 26 to celebrate his life and legacy. Grant was shot at the Fruitvale Station platform on Jan. 1, 2009, by BART officer Johannes Mehserle,