GLOVERSVILLE — City Court Judge Vincent DeSantis is considering a motion by attorney Matthew Trainor to dismiss a case against City Hall watchdog Robert Castiglione, who is accused of harassing the mayor. In City Court Thursday, Fulton County District Attorney 1st Assistant Chad Brown called Mayor Tim Hughes as the first witness in the case. Before Hughes could testify, though, Trainor argued the case should be dismissed because of mistakes made in the initial filing of the charges. Castiglione, 66, was arrested in October for allegedly following Hughes around the city and parking outside his home and place of business several times, causing the victim to be “annoyed and alarmed,” according to police documents. Trainor argued the initial “accusatory instrument” charging Castiglione with harassment is actually a form used for disorderly conduct. In hindsight, the section number for the violation was changed with a pen, from disorderly conduct to harassment, Trainor pointed ou.