Only if their caught streaking in three different centuries. Or, it can be proved they have a husband or wife in each of four different centuries.
One doesn't prosecute on-principle; the deed is in the doing. So, like anything else, you would have to show that this person's actions have caused financial or other manifest harm to someone or some thing. You wouldn't prosecute for time-travel, you'd prosecute for insider-trading, or influencing an election or a game outcome, etc.
So since we don't have any law that outlaws time-travel, this can clearly be taken as proof that time travel is possible, and that someone has travelled back in time and changed the law so as to not outlaw it! Please Register or Log in to view the hidden image!
A time traveler could go back to a time before the law, and for instance, make sure that whoever suggested it got a different career.
Well, that's the thing about time travel. Either it can change events or it can't. But if it can't then it's really more temporal clairvoyance. And you couldn't break any laws.
We all travel in time only. I start my journey at 0830 Hrs in the morning and reach to the destination at around 0945 Hrs. Even the judge who would prosecute time travellers would be travelling in time. Would you call this as time travel, if not then what is time travel?
How could you prove it? The world you are in might not be the same world the 'criminal' is in, and if time travel were rampant, there'd be so many worlds that Hugh Everett would get confused. Too. Please Register or Log in to view the hidden image!
Should be prosecute time traveler or not? There is currently no law against it so no, we can't prosecute what isn't illegal. Should we keep track of time that has been traveled in the past as well as time that will be traveled in the future and if the two don't balance should the difference be taxed? Shouldn't time travelers be paying their fair share?
The law would proceed as if time travel did not exist. Catch someone and they can prosecute. The onus is on the traveller to try to prove he's not ... himself. Good luck.
So you see my point, but you missed it all the same. Please Register or Log in to view the hidden image! Not to mention that the law requires the accuser to prove a bad act or the intent to commit one, not the accused to prove his innocence. Dunking stool? Trial by fire? Get medieval often? What the fuck, man?
"I'm not me" is not a valid defense. In a world where time travel is not legally recognized, the defendant will have all the normal acts of law applied to him.
Do we prosecute the crews of airplanes for defying gravity? Certainly not. If the Wright brothers hadn't done it first, someone else would have done the same thing. It's the same for prosecuting time travelers for what they do. Anytime something appears to have been too fortunate to have been a coincidence, thank a time traveler.
Or conversely, prosecute the guy who didn't slap the mosquito that could have given Idi Amin malaria.