During the debate, Mr. Muir noted: “President Trump, as you know, the FBI says overall violent crime is coming down in this country.” But Mr. Muir would have been much more accurate if he said that the number of crimes reported to police fell, which isn’t the same as total crime. He might also have conceded, as Trump pointed out in his response, that fewer than half of police departments reported complete data to the FBI in 2022.