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


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.