Thanks to the video just posted by Skip, we can see what Denver7 did: they deliberately left out some video to make the police look bad.

Just after the chief says "For the next 13 seconds...", he actually says "...officers continued to give at least 5 commands to Mr. Black to drop the gun and to show his hands". Then he says "We don't know why, but for whatever reason..." which is where the Denver7 video picked up after the pause.

Could the pause have been accidental? To me, extremely unlikely given "news" people record all the time and would know when to stop recording. Because of the critical break and what is said immediately before and after, I see no other plausible explanation other than a political and anti-police agenda. I'm not commenting on the incident itself and any blame or culpability Aurora PD may have. However, I am saying that I believe Denver7 is fake news and is not to be trusted.