Morning Rundown: Calif. school shooter used ‘ghost gun,’ impeachment takeaways, Tesla's 'bulletproof' cybertruck, Mr. Rogers’ timely appeal

DNA 'Magic Box' gives police quick crime scene results

00:41

Tonight on "NBC Nightly News With Lester Holt," Morgan Radford visits a police department using a new DNA tool that could revolutionize police investigations, but is raising concerns from privacy advocates.