Although not 'prequels' in the sense of having related plots, the two other films The Incident and Against Her Will: An Incident in Baltimore both feature the characters of Harmonn Cobb and Judge Bell.
Baltimore | Baltimore Orioles | Baltimore Ravens | Baltimore and Ohio Railroad | The Baltimore Sun | University of Maryland, Baltimore | Baltimore County | Baltimore City College | Baltimore County, Maryland | Charles Calvert, 5th Baron Baltimore | Benedict Calvert, 4th Baron Baltimore | Baltimore Symphony Orchestra | University of Baltimore | Baltimore Orioles (19th century) | Baltimore Museum of Art | Baltimore Light Rail | Marco Polo Bridge Incident | Frederick Calvert, 6th Baron Baltimore | Baltimore Police Department | Baltimore, County Cork | University of Maryland, Baltimore County | The String Cheese Incident | The Curious Incident of the Dog in the Night-Time | Charles Calvert, 3rd Baron Baltimore | Chappaquiddick incident | Baltimore's Marching Ravens | Baltimore Gas and Electric | Yangtse Incident: The Story of HMS Amethyst | Yangtse Incident (1957 film) | Washington, Baltimore and Annapolis Electric Railway |