Charlie Kirk assassin's alleged gun was powerful, vintage and hard to trace

In the frantic hours after Charlie Kirk’s assassination , investigators discovered a gun in a wooded area near the scene in northern Utah. The federal agents seeking to trace the weapon faced a daunting task. It was a decades-old, German-made rifle built for use by the military in both World Wars, according to multiple law enforcement sources familiar with the investigation. So old that it may have been brought into the U.S. before laws were enacted in the 1960s