Charged with perjury without specific action Suppose a person testifies, under oath, on two different occasions, as to certain events. The two sworn testimonies are in direct and clear contradiction to each other. For example, one time Jane Doe testifies that Joe Smith was present at a crime scene, and the next testimony is that he was not (ever) present. There is no independent way to determine which statement is true, and which is false. Nevertheless, one of the statements must be false. Can a charge of perjury be laid against Jane Doe in such a case, without specifying which actual testimony? If a charge of perjury is impossible, are there other false statement charges that could be brought?
In Wisconsin, right after the perjury law, they have a law prohibiting "false swearing". It applies if a person: Makes or subscribes 2 inconsistent statements under oath or affirmation or upon signing a statement pursuant to s. 887.015 in regard to any matter respecting which an oath, affirmation, or statement is, in each case, authorized or required by law or required by any public officer or governmental agency as a prerequisite to such officer or agency taking some official action, under circumstances which demonstrate that the witness or subscriber knew at least one of the statements to be false when made. The period of limitations within which prosecution may be commenced runs from the time of the first statement. So even if they couldn't actually get you for perjury, they could get you for violating this law. Perjury and false swearing are both class H felonies, so you can expect the same punishment. I am going to guess that the existence of this law suggests that it was needed to cover what would otherwise be a loophole in the perjury law, but I can't say for sure.
No, a later trial is not allowed A prosecutor can, and often will charge multiple related crimes, and all will be addressed at the same trial. But once a person has been acquitted on a given set of events, the same jurisdiction cannot re-try the same person on what is often called a lesser included offense. Nor on a greater offense implied by the same events. Not even if additional evidence comes to light. However, if an act (or set of acts) is a crime under both state law and Federal law, for example theft by deception (state crime) and wire fraud (federal crime) one jurisdiction may try the person even after ther has been an acquittal in the other. I think the same rule applies if an act is a crime within the jurisdiction of two different states, that both can trey the accused. In many cases prosecutors will choose not to bring the second trial, but they can if they see fit.
Even before the police have any idea who did it, Bob is guilty of whatever wrong he did. However, if you want this to be a legal question and not a moral one, we should assume that you really want to know "Can Bob be convicted of murder, if the evidence proves that he did do it?". Yes, he can. See Morris v. State, 214 S.W.3d 159. The critical question was whether the defendant understood the charges (he did) and whether he could assist in his defense (he could). The desideratum of being able to assist in your own defense only goes so far. On the other hand, maybe no, per Wilson v. US. A government expert witness "testified that appellant had permanent retrograde amnesia and would not be able to aid in his own defense in terms of remembering any of the acts alleged in the indictment". The crucial difference seems to be whether one just has loss of memory, vs. loss of memory connected with some other mental disorder. [Addendum] Per Dusky v. United States 362 U.S. 402, competence to stand trial depends on whether the accused has sufficient present ability to consult with his lawyer with a reasonable degree of rational understanding -- and whether he has a rational as well as factual understanding of the proceedings against him. I am not aware of any exceptions e.g. whether this is not the case with strict liability crimes like statutory rape, and since it is generally held that "competency" is a requirement mandated by the due process clause, I don't think there could be an exception.
What remedies are therein the United States? I would imagine that the witness could be prosecuted for perjury. My guess is that the plaintiff could prosecute the witness for the lost damages. Are there any other remedies like reopening the original trial or declaring a mistrial so that the plaintiff could sue the (deep-pocketed) defendant, or would this be double jeopardy? Perjury prosecutions are like unicorns. They are rumored to exist but are almost never seen. A prosecutor would be exceedingly unlikely to bring charges in such a case, but it might not hurt to ask. Even if the criminal prosecution prevailed, however, the defeated plaintiff would be no better off, or might get out of pocket court costs as restitution at most. You could request that the witness be sanctioned for contempt. But, this leaves the loser in the original case no better off unless the judge made the highly unusual decision to award compensatory damages as a contempt sanction. Similarly, if you have reason to believe that the attorney knew that the testimony offered was false, that would be grounds to grieve the lawyer which could result in the lawyer's suspension or disbarment, but that is very difficult to prove and again would not advance the unjustly defeated plaintiff's cause. Assuming that the time to move for a retrial (usually two weeks) expired when the new evidence was discovered, you could move to set aside the verdict (Federal Rule of Civil Procedure 60 or the equivalent state rule). The deadline for such motions based upon fraud by an adverse party is usually six months. Sometimes an independent action to set aside the verdict for fraud on the court could also be brought (sometimes within two or three years), which is an uphill battle, but probably the best option if all other deadlines have expired. The witness probably has absolute immunity from civil liability outside that court case for the testimony offered, so a civil action suing the witness for lost damages would be dismissed. The doctrine of double jeopardy does not apply, but a similar doctrine called "res judicata" (a.k.a. "claim preclusion") prohibits retrying a case that was tried on the merits between the same parties, if it has become a final order. So, filing a new case is ruled out assuming that no appeals were filed within the deadline for doing so. And, even if the deadline for filing an appeal has not lapsed, it probably wouldn't prevail because the key new evidence wouldn't be in the record. It would be better to file to set aside the judgment in a motion and to appeal if that motion was denied.
What exactly would a prosecutor charge? State? Federal? It depends on whether it is a state or federal prosecutor. It appears that the president has at least flirted with violating both federal and state law, in which case he may be charged by both the federal and state prosecutors, each one laying charges under the relevant body of law. Would Trump be vulnerable to Federal prosecution of the phone call after he leaves office? Yes, if the facts support such a prosecution. It's not clear to me that the conversation constituted an unambiguous violation of the federal statute, but I have no knowledge of any precedent that might inform such a determination.
There is no hard and fast rule to determine what constitutes proof beyond a reasonable doubt. In the first instance, the judge (or jury, when there is a jury trial) decides this on a case by case basis. If the officer testifies that the matters recorded in the ticket are true because it was the officer's practice to always record accurately what happened in a ticket, this would ordinarily not be grounds for reversal of a conviction on the ground of insufficient evidence, unless other evidence somehow put the officer's testimony in serious doubt (e.g. a social media post clearly putting the officer in another location at the time that the ticket was allegedly issued). Normally, the only kind of evidence that would not result in a ticket being upheld on appeal would be the failure of the officer to testify at all.
Assuming that the above can be established by admissible evidence, that sounds like a case for first degree murder, and probably various other crimes as well. In some jurisdictions there is a specific crime of &quot;Murder for hire&quot; which might also apply if available on the jurisdiction where this occurred. A comment mentions a possible insanity defense. That is going to depend on detailed facts not included in the question, but might be possible.
It is certainly possible for the same action to break multiple laws, and be chargeable as multiple crimes. For example, shooting and killing someone may be assault, assault with a deadly weapon, and murder all at the same time. For a different example a person who simply omits to file an income tax return may be guilty of both failure to file a required return, and failure to pay tax due, and in some cases failure to par required estimated tax due as well. For yet another example, driving well above the speed limit may be a violation of the speed limit law, and also careless driving, and possibly also reckless driving. In the first case the assault etc may be lesser included offenses in the charge of murder. That means that they are automatically available to a jury (or judge) trying the accused, who can convict on one of the lesser included charges if they do not convict on the primary count. For the more general case, I don't know of any special term for the situation. It is not usual to have law A which says "do not do X", and also law B which says "you must follow law A". There is no general principle against having such redundant laws, nor is there, in the US, any Constitutional rule against such laws. But legislatures do not normally bother to enact such redundant laws. Laws which will sometimes overlap in their coverage, but in some cases do not overlap are common.