In the five days between the killing of UnitedHeathcare CEO Brian Thompson and the arrest of suspect Luigi Mangione, it seemed impossible that no one came forward with information about the 26-year-old's identity, even as images of his face were plastered everywhere. And as it turns out, Mangione was indeed apparently identified by authorities in San Fransisco, but it's unclear whether the FBI ever got the information. The San Francisco Chronicle reports that two sources familia...
