Nearly a week after the UnitedHealthcare CEO was gunned down outside a New York City hotel, Aaron Katersky has the latest on police taking 26-year-old Luigi Mangione into custody as a person of interest after he was recognized at a McDonald's in Altoona, Pennsylvania; Stephanie Ramos has details on a jury finding Daniel Penny not guilty of criminally negligent homicide for the chokehold death of Jordan Neely on a New York City subway train; James Longman reports from Damascus, where Syrian rebels have seized power and forced Pres. Bashar Al-Assad to seek asylum in Russia; and more on tonight's broadcast of World News Tonight with David Muir.