NYPD to question man suspected of supplying parts to assemble AR-style rifle used

Joining us now, NBC News National Law Enforcement and Intelligence Correspondent Tom Winter, retired NYPD detective and director of the Black Law Enforcement Alliance, Mark Claxton, and retired NYPD officer and police uh policy director for our streets criminal justice and civil liberties team, Jillian Snyder. And Tom, let's start with you. We're getting some new information here that the at least part of this gun that um this gunman used in his attack may have been given to him or provided by an associate. ...