More than seven months since he resigned from office and pleaded guilty to five felonies and seven misdemeanors, former county supervisor George Shirakawa Jr. will finally be sentenced for crimes that include perjury and a misuse of campaign funds. Judge Daniel T. Nishigaya, the third judge to handle the case, set Nov. 8 for sentencing. Defense attorney John Williams said he might call a character witness, who happens to be a member of the Mercury News editorial board.