Omaha police are asking for help locating witnesses to a shooting that took place Sept. 23.Officers said KeShon Henderson, 17, was shot near the intersection of 42nd and Sprague streets.The Omaha Police Department wants help identifying the owner or operators of the vehicles in this video who are driving through the intersection. Those drivers are believed to be witnesses in the shooting.Anyone with information is asked to contact the Homicide Unit at 402-444-5656, or those who want to remain anonymous can contact Crime Stoppers at 402-444-STOP (7867) or www.p3tips.com.