entering the subway system about two hours before the shooting began. investigators also linking the gun found at the scene to autho tracked the alleged shooter is expected to be in court later thursday afternoon. and of course, no one in law enforcement expected this is the way the manhunt weekend. the suspect calling on himself, calling crime-stoppers, telling them hey, i am at this location. come and get me. shimon prokupecz, cnn, prook li brooklyn, new york. for more on the story, let s bring in bobby chacon, who is retired fbi special agent and he joins me now from palm springs, california. thanks so much for being here with us. so, um, the authorities say they shrunk the suspect s world. seem to be taking credit for apprehending him but in the end, as we just heard there, he effectively turned himself in