unfortunately, officer lopera used what he called a "rear naked choke." it infers that the target is the throat and objective is to choke off the air supply of the victim. very dangerous.
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the carotid artery submission hold is similar in appearance but targets the carotid arteries at the side of neck with the objective of interrupting the blood supply to the brain. applied correctly it avoids dangerous contact with the throat and is effective in just a few seconds.
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honolulu police train to use the carotid artery submission hold in violent confrontations instead of resorting to using a firearm. correctly applied it is very effective and gives the officer precious seconds needed to secure the person with handcuffs.
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if you have not been trained in the proper application of the carotid artery submission hold you should never attempt to use it. it is dangerous if misapplied, both to the person targeted and to the officer who must engage in close quarters hand to hand struggles.