The brother of a taxicab driver killed last month in a fiery shootout and crash on the Las Vegas Strip is speaking out against gun violence. Tehran Boldon urged members of the Senate Judiciary Committee on Friday to ban assault weapons and high-capacity magazines. “Assault weapons have no place on our streets, and high capacity magazines have no place in our country,” Boldon told the committee. “Law enforcement, military — that’s one thing. But civilians don’t need those.” His brother, Michael Boldon, was one of three people killed Feb. 21 when the driver of a Maserati was gunned down and …