The cold open makes the pitch every week. Boston is a great city, but there is more to it than the Freedom Trail and Fenway Park, and this is the guided tour of what else is there. Barry McGuire hosts. He introduces himself as a 20-year private investigator on the streets of Boston who helps run a company called Impact Due Diligence Investigations, and that background shapes how the material gets handled. Cases are built as chronologies. Dates, streets, victim names in order. The Boston Strangler run works through the 1962 killings methodically — Nina Frances Nichols found on Commonwealth Avenue with her own stockings around her neck, Mary Mullen at 85 whose death was logged as a heart attack until Albert DeSalvo admitted to being there. McGuire is pointed about the failure at the center of that case: the police did not crack it, DeSalvo came to them. The 99 pub massacre of 1995 gets similar treatment, tracing four deaths in a crowded pub back to a street beef at a cafe the night before and the North End loyalties behind it. Other episodes cover the 2018 killing of James Bulger, the Maura Murray disappearance and the theories and suspects that have accumulated around it, and running coverage of the Karen Read case as motions move through court. Big cases are serialized. Part one lands, part two comes the following week, and listeners are told plainly where the break is. Episodes open with a housekeeping stretch that functions as the show's front porch. Listener email gets read. Fans get shout-outs by first name. A brother of a murder victim who has been writing in gets acknowledged. Guests appear occasionally, including an interview with Aiden Carney of Turtle Boy News about the Karen Read case and the felony counts Carney faces. The register is conversational and unedited-sounding — asides, blunt character sketches, the occasional admission that a case got too grim to finish in one sitting. That last quality is worth noting. In the Blackstone House of Horrors episode, McGuire says he cut it short because he could not keep going, then returns later to add what he left out. Sign-offs are warm and local. Merry Christmas, take care of each other, see you on the flip side. The neighborhood knowledge and the investigator's instinct for who owed what to whom are the through line. For anyone who wants Boston crime explained by someone who has worked the ground rather than researched it from a distance, this is that.