now. and hello and welcome to our viewers in the united states and around the world. you're watching cnn live coverage. i'm natalie allen. ♪ ♪ i'm gonna let it shine >> hundreds sang, lit candles and prayed sunday night for the new york city police officers gunned down in an ambush as they sat in their patrol car. we're learning more about the killer and his two-state crime spree including his threatening online posts and how the warning for the nypd came just a few minutes too late. the new york police department is beefing up security in response to this attack and threats made against the nypd. one of the biggest changes right now, the department is taking all of its auxiliary officers off the streets. auxiliary officers are unarmed volunteers who wear nypd uniforms and deal with minor situations and traffic control. the nypd is also adding extra