Didnt He Wait News Today

Officer, ask for help call for backup or is it clear to his fellow officers that hes about to try to make an arrest on somebody who, whether he resists or fights at that point, we dont know, but he does run. so at this point, we see within a minute or two that a second officer has arrived. so it does raise the question why didnt he wait. if he had an officer that close, he should have heard it on the radio, what the estimated time of arrival was for his backup why doesnt he wait for the second o...