"Agreed. You have to however keep in mind what the Police have to deal with on a daily basis, with much the same excuses to gain some advantage and possibly escape or attack the Officer".
I get what you are saying and have been in a similar position while not for as long a period. The job jades/exhausts people to insulate them from the things they see and at that point a seemingly intelligent, normal human being puts their body weight on the carotid of a person on the ground. 10 to 15 seconds of occlusion results in a much lowered level of consciousness and reduced respiratory effort, that officer knelt on that persons carotid for seven minutes or five minutes longer than he was conscious. Many officers have seen what he saw and worse and not done that. This is not the first episode of this type of insult to a controlled prisoner either, training SHOULD have taken place to make officers aware of the methods that can be used to control a suspect or prisoner and kneeling on the jugular for any length of time is not included. Three other officers allowed it to happen through apathy or group ties and that itself is a problem as well as a strength. With it the social and moral breaks we all have can be responsible for all kinds of excesses. https://en.wikipedia.org/wiki/Stanford_prison_experiment this proves the consequences of our moral judgement being impaired.
Basically put, there was no need for the man to die, he did not have to break the law and the officer could have let up well before he did. Two wrongs do not make a right and no, I am not perfect.