Listen, you are claiming this cop is too stupid to realize he accidentally suffocated this man. You also claimed they weren't trying to hurt him.
Fine. Fine. OK. Have you ever been in a situation like this? Either pinning someone down or being pinned down? How about with your hands handcuffed behind your back? This officer did not let up at all. He heard Tony mumbling into the ground, and sat with his knees on his rib cage, the thing that holds your lungs. He wasn't just a wee bit negligent, he was abhorrently careless with this man. They sat and made jokes, instead of treating this man with care, a man who called 911 himself for help
You are giving these policemen too much slack. I cannot reiterate that enough. These men are trained, they know what the fuck they are doing and they pushed the boundaries and lost control of their responsibilities for the protection and safety of citizens They killed this man. They laughed after they said "Hope he's not dead" HE CALLED FOR HELP AND THEY FUCKED UP AND KILLED HIM. THEY DESERVE THE NIGHTMARES THEY MIGHT HAVE.