Kirby Bradford, accused of shooting a Palermo man to death last year, has been indicted on a new charge in the case. Bradford, 59, was indicted Thursday on a charge of possession of a firearm by a prohibited person by a Waldo County grand jury. In November, he was indicted for the murder of Robert Bruso, a 56-year-old contractor he had known for more than 20 years. In September, police charged Bradford in Bruso killing, which they say occurred o…