These kinda people, cops, whose jobs are supposed to protect people and the safety of the neighborhood, abuse their so called power and they wonder why public have certain amount of disdain towards them. This is why. And they have these "rules" to never rat on fellow cops, doesn't matter what they done, they will stick together, or so that's what I've heard.
If that guy is innocent, then I feel bad for him.
But the only thing that I can learn from this, is just to remind myself that sometimes there are people who's in a position of power and they use that to abuse you, whether the power is their job credential, or even maybe just of physical strength, which in this case, there are both since there are four big men that you definitely cannot fight back because basically they're cops.
And I also I can remind myself, that I believe in karma. That there will be justice that shall be brought upon you for everything that you've done and everything that's done to you. In that way, if I was in that man's position, that will probably help me to deal with that incident, even though the justice will probably be never seen with the prosecution of this incident and those cops, then the justice will come to you in other form. Other form that you might not be able to imagine. I really do believe that. Otherwise, then life would be just too cruel.
I get a bit sentimental about this because I know someone who was abused by the police, and when he told me his story I felt really bad for him. And the karma stuff was something that I said to comfort him. I did believe that. And still do.