As a former Provost Marshal, I can tell you that any MP who treated a suspect like this cop did would be at the end of their career as well. Possibly their supervisor as well.
That being said, on shore patrol we used to have technique known as "clamshelling" which involved two stokes stretchers and a fistful of zip ties. You have to remember to flip the guy face down and put him on a couple saw horses once he stops fighting. Much easier to clean up after he pukes. Never did any use of force documentation for that.