Walter had retired as a veteran commercial heating technician seven years earlier. In the late 1980s he helped modernize the building's ventilation and boiler system when Graham's father still owned the neighborhood diner. He had spent countless winter mornings in its basement, repairing belts and replacing cracked valves while the kitchen filled with the smell of bacon. He knew the building's old utility runs in a way no recent contractor could. But knowledge from thirty years ago was not a substitute for a current inspection, and Walter repeatedly reminded Noah of that distinction. “They have to test everything,” he said. “I can tell them what I remember. I can't tell them what works now.”
The fire department's initial checks supported his concern. A vent serving a gas-fired appliance showed evidence of obstruction, and carbon monoxide had accumulated in enclosed spaces. Investigators would need to establish when the fault developed, whether any safety devices were bypassed, and who had access. Ambulance staff recommended hospital evaluation for Luis, who had headache and nausea, and for Marisol and her son as a precaution. No one knew whether the concentration would have risen further overnight, but the danger had been real. Noah drove Evelyn and Walter to a twenty-four-hour motel after an emergency housing coordinator found them a room. Their clothes smelled of cold pavement and diner grease. Walter held the brown envelope close, refusing to let it out of sight. “Graham says the detector never worked,” Noah said in the car. “Do you have proof you bought it?” Walter nodded in agreement. “The receipt, photographs of the display, and a voice message I left his office. I recorded the model number, too.” Evelyn added that Graham had removed the device in front of her that morning. Noah urged them to tell the investigators everything, including what they didn't remember precisely. At the motel, Walter tried to hand Noah a twenty-dollar bill he'd kept hidden in his coat lining. Noah refused. “You'll need breakfast.” Evelyn reached for Noah's hand. “The food mattered,” she said. “But what mattered more was that you listened.” Noah thought of his own father, who died when he was eighteen after a long illness. People had often made decisions about his family without hearing them first. He understood what it felt like to be treated as an inconvenience. At one in the morning, Noah received a voicemail from Graham: “If you tell anyone I ignored those complaints, I'll make sure you never work in this town again.” Noah played it twice, then forwarded it to himself and saved the original. The threat frightened him. It also suggested Graham was thinking less about the tenants than about protecting his own story.