✔ 最佳答案
Okay... Let's see if I can answer this cleanly and without the misconceptions.
There is no certification required of martial arts or martial artists. If there were, there'd be no such thing as McDojo(s).
Pugpaws is absolutely right -- if you commit a crime, you are held to the same standards as everyone else. Now, where this gets complicated is dependent upon your state.
[ALL MARTIAL ARTISTS SHOULD PAY ATTENTION HERE:]
So allow me to give an example. In California, assault is defined as "an unlawful attempt, coupled with a present ability, to commit a violent injury on another person." (Penal Code 240) This means that assault could be the perception of the ability to commit a violent injury in addition to a present threat of injury. ADW (Assault with a Deadly Weapon, or Aggravated Assault) is defined as "an assault that is committed with any type of deadly weapon or by means of force that is likely to cause great bodily injury to another." (Penal Code 245(a)(1)).
According to
http://www.shouselaw.com/assault-weapon.html
The decision as to whether an assault is an aggravated assault is commonly brought upon 1 of 3 factors:
1.) the type of weapon or instrument used to commit the alleged ADW.
2.) whether the person whom you allegedly assaulted sustained an injury (and if so, the severity of the injury)
3.) the nature of the victim (that is, whether the alleged victim an officer, firefighter, or other "protected" person)
245(a)(1) defines a deadly weapon as "an object, instrument, or weapon that is capable of producing and likely to produce death or great bodily injury." Now, since hands, feet, and other body parts are not an object, instrument, or weapon, it is commonly argued that they do not qualify as deadly weapons. However, prosecutors have argued, successfully, that if the hands, feet, or other body parts were "capable of producing and likely to produce death or great bodily injury", they qualify as deadly weapons.
This is the same sort of argument gun control advocates make: Is the emphasis of the language on "A well regulated Militia, being necessary to the security of a free State," or is it on "the right of the people to keep and bear Arms, shall not be infringed."? You can see that a whole country is divided over this issue, and lawyers and judges on both sides, adept in interpreting the law, can not agree. Vague language can be easily manipulated.
Back on point: If you were arrested for and charged with aggravated assault, the prosecution may argue that your background in a martial art made you "capable of producing and likely to produce death or great bodily injury". Now... Let's say that the person in this situation was a drunk, off-duty, police officer, who was killed as a result of your fight (two hits -- you hit him, and he hit the ground. It happens.) and you were arguing self-defense (an affirmative defense) and lost (say because the jury felt your training meant you should be held to a higher standard -- again, this happens). So your aggravated assault would be a felony, and a death occurring during the commission of a felony is murder, and you are S.O.L.
As a martial artist, you have a responsibility, whether you like it or not, to use restraint, and it's a jury that determines whether you've lived up to that responsibility. 12 citizens, statistically unlikely to have any martial arts background, are going to decide whether or not you are behaving in a responsible manner. But, you are not held to any different a standard than any other law-abiding citizen otherwise would be. Everyone has the potential to cause grievous bodily harm to another with no weapons at all.
I believe strongly that, as a martial artist, you have a responsibility to know the laws in your area and in any area you may find yourself. Assume the worst, and you'll live a lot longer.