Law.

The Law should be cut and dry, avoiding complications, especially when the obvious is staring you right in the face.
It often does not work that way, especially in this day and age when everything seems so jumbled and uncertain.

A person walking down the street gets beaten within an inch of their life, but the assailants call the police after they flee the scene and the victim ends up going to jail after a quick trip to the ER to get a patch job done so they don't die.
What about the person that gives concent to aid in the situation? That good sumaritan that just happens to lend a hand? They turn around and file charges against the victim as well because they were exposed to bodily fluids of the victim, though they had seen the blood to begin with.
Perhaps they became squeamish, they freaked out a little bit at the sight of a cultural taboo, that animal side of things that society would rather lock away in a dark place and ignore for all eternity?

Now the victim has charges against them, sitting in a jail cell with a splitting headache, just starting to realize up from down in a world that is constantly spinning from behind bars.
No weapon, no proof, but charges filed never-the-less. We like to think the law is cut and dry, but even then, you cannot be certain how things will turn out, even with a deep understanding of how things work.
Perhaps you can use such knowledge to fight your way out of it, but the fact remains that you are forced to fight in the first place when the obvious was staring everyone right in the face. Did they fail to see it? Doubtful.

Some might say it is not our place to question those charged with the service and protection of everyone else, but the fact remains, as with everything else, if no one questions then the system cannot be fine-tuned and get running clean.
The majority of Budoka rarely think about the legalities they may face when the dust settles, but even worse, the legalities are not easy to follow and often the courts are so bogged down with various cases they seldom give time for a case to be heard, nevermind the cost in dollars it takes just to appear before the judge.

I would ask if this is what a person truly wants, to play at time-consuming Courtroom Ukemi, but often there is no choice.
Bad things happen, I am not going to say to good people, but bad things happen to everyone, sometimes to those who have it coming, sometimes to those who fail to see it coming.
Either way, you end up where you don't want to be, sometimes you know exactly why you were there and how it could have been avoided, sometimes you have no clue and there was no way to avoid it to begin with.
Justice may be blind, but often, it seems, it is also ignorant. That does not mean it does not work where it needs to work, but lately it seems to be hit or miss.

I am not speaking in hypotheticals here, in case someone decides to pipe up with "That scenario could never happen!"
The scenario DID happen, just a block from where I am presently living, it happened to my brother, who is still having nightmares from the head trauma, and still facing charges from the person who helped him, though the charges by those who assaulted him have been dropped, but only AFTER he spent two nights in jail where they refused him medical treatment until his second appearance before the judge.
The charges he is facing are being filed by the person that helped him, for getting blood on a new tattoo he is facing Assault 2.

This isn't a game, this is the world we live in. It may not be as bad where you are, but it is getting pretty bad in other places and I doubt it will be long before it gets bad there too.
Just some food for thought.