A 64-year-old Pittsfield man is being held on $5,000 cash bail on charges that threatened to blow up City Hall because of his high taxes. Prosecutors said David Shufelt went to City Hall Tuesday morning to pay back taxes. The Berkshire Eagle reported that a casual conversation between Shufelt and a female employee turned into a rant by Shufelt, who said that he cannot afford to pay for insulin because of all the taxes he pays. Police allege he told the woman that if he had a bomb, or the means to make one, he would blow up the building and kill everyone inside. Shufelt pleaded not guilty to a charge of making a false bomb threat.