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As a judoka, I always wonder about this issue. As far as I know, someone that has lost consciousness has a risk of swallowing his own tongue and dying after few minutes.

In which position should I leave an attacker after I put him unconscious in order to avoid possibly killing him?

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The recovery position, while not universally appropriate, is a good thing to keep in mind. – Dave Liepmann May 15 '14 at 8:32
WOW, it is way too early to accept an answer! Leave it for at least 24 hours. That way, it leaves others the opportunity to comment, up or down vote, and leave their own answer. – Sardathrion May 15 '14 at 8:52
ok, ok... I liked the talk by the law professor, btw! – shackra May 15 '14 at 22:04
That is a question to bring up to your coach, btw. hes the one who teach you to choke poeple, hes also the one who should teach you about recovery. – Thierry Savard Saucier May 21 '14 at 19:06
up vote 5 down vote accepted

If you are not a trained first aider, then I strongly suggest you did a course as soon as possible. As David Liepmann said, the recovery position is generally safe. However, if you are not a trained first aider, you might miss either something or do the wrong thing or exacerbate things that will lead to the victim dying.

I am not a lawyer, nor do I play one on TV. That said, if you have rendered someone unconscious in a fight, it is your responsibility that they do not die. That is true even if they attacked you first. It means that you must contact the emergency services (112 should work in most countries) and ensure that the victim stays alive. For that, I strongly suggest being trained in first aid. Otherwise, you risk being arrested and charged with murder. Whatever, never talk to the police but talk to your lawyer as soon as possible.

If you wanted an authoritative answer, I would talk to some paramedics and lawyers.

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I know that it is my responsibility to keep the attacker alive, even if he tried to kill me, that's why I did the question in first place :) – shackra May 15 '14 at 8:51

If you choke out someone, even in a real fight, normally just stopping to choke him will be enough for him to wake up. If he isnt waking up alone after 10-20 seconds, you can assume something bad happened.

That is, unless you went REALLY intense on him (that means more than 30 seconds choking him). You need about 3 seconds to choke out someone ...

and when he wakes up, he wont have much fighting in him left, so you dont need to choke him for the full 30 seconds, you'll end up hurting him.

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