It’s not a well kept secret that restricting cranial blood flow for three minutes is enough to render most people braindead.
They are doing this on purpose
Once again, police pin a handcuffed man face down, one knee on the back, one knee on the side of the neck. Both carotid arteries are restricted. Kneeling on his back induces an extreme twist of the neck impeding if not completely blocking one artery, the other blocked directly by the other knee.
You don’t do this to restrict people. You do this to kill people. If they wanted to just be assholes and inflict distress, they would kneel on the back and head. They do this to torture people to death. These cops are murderers just like Derek Chauvin and his fellow officers.