I think what is being "hidden" is the environment and culture of the local cops. Cops get training to help them avoid making the mistakes we see in the video. The cop in that video got that training, and yet there he is, losing his future (and the perp's future) for all to see. How does that happen? Culture failure. At that critical moment, he felt in his gut that it was OK to bend the rules of his training. I'd be willing to bet that he has personally seen many bendings of the rules in his day-to-day duties, things his management tolerates and looks the other way.I feel that the media ...and those in charge are possibly hiding something about the whole incidence as well.
There are parallels in business that many of us have probably seen; the gap between policy and reality regarding safety or quality programs. There's the corporate policy and training, and there's the reality on the ground. A well-run operation has a small gap. Toyota comes to mind. In far too many companies, there is a giant gap.
I'll bet this cop's superiors are wetting themselves over what will be found out.