Is cross examination strictly confined to the subjects that the original examination pertained to, or can the opposing party make their own points? Pretty straightforward question, really: what are the topical constraints of cross examination with reference to examination? Suppose party A calls witness W to the stand to ask them questions about the alleged motive and means for the crime. Party B now cross examines W but would like to use the opportunity to raise points rather about W’s whereabouts and possible alibi so the questions B would ask W in CE actually have nothing to do with those asked of W by A shortly before. Are they nonetheless allowed?
On cross-examination any relevant questions can be asked. It is re-examination that is confined to clarifying whatever new questions/issues were raised during cross.
While there are certainly statutory and procedural vehicles for sanctions, they are almost never requested or allowed when moved for, and are almost never imposed by judges. Something very severe needs to occur and not just your typical discovery violation ("speaking objections" during depositions, being late with responses, failure to cite to affidavits, affidavits citing conjecture rather than fact, et). It would have to be something quite serious....like misleading the court or directly failing to comply with a direct order or ruling on a motion. It is exceedingly rare. It is most seen in Federal Court.
You are allowed to ask the police whatever questions you like. There is an upper limit that you can't refuse to obey a lawful order on the premise that you want to ask a bunch of questions, but they don't seem to have ordered you to do anything, so you can ask away. They have no obligation to tell you anything or to be truthful, except for certain questions like "am I free to go" when you want to leave and are testing whether you are under arrest. Even then they don't have to answer your questions right away. The police can therefore ignore you, especially if you are asking curiosity questions. It might be that they are restricted from giving information in certain circumstances (pertaining to the privacy of others). If there is an issue of legitimate concern (e.g. Little Billy has been beating up on cats again) and you feel that you need to know this, then you can request the police record on the matter. Certain information will probably be redacted under state law, but you could get a report that states that some [redacted] juvenile was beating up on animals. The Florida records law is one of the first in he nation, dating back to 1909. You can read this, to see if you think the circumstances match one of the exemptions, though all you have to do is make the request and be told that the record is exempt, then you will have some idea what was going on.
In your example, there is nothing that indicates to me that there is a "particularized and objective basis for suspecting the particular person stopped of . . . criminal activity". If you have described the totalilty of the circumstances, the officer does not have the right to arrest or detain the individual. To your broader question about how specific descriptions must be in order to provide a basis for a stop, the assessment is based on the "totality of the circumstances". For example, an anonymous tip that "a woman would drive from a particular apartment building to a particular motel in a brown Plymouth station wagon with a broken right tail light [carrying cocaine]" was enough to warrant a stop. Alabama v. White, 496 U.S. 325 (1990)1 In contrast, the court "determined that no reasonable suspicion arose from a bare-bones tip that a young black male in a plaid shirt standing at a bus stop was carrying a gun." Florida v. J. L., 529 U. S. 266 (2000) The “reasonable suspicion” necessary to justify such a stop “is dependent upon both the content of information possessed by police and its degree of reliability.” Navarette v. California 572 U.S. ___ (2014) In any case, a crime must be part of the particularized suspicion. 1. This case focused on the indicia of reliability necessary for an anonymous tip to support a reasonable suspicion, but it is also an example of a degree of non-specificity in identification of a suspect.
The appellate court gets the trial transcript which includes all the testimony (and exhibits or descriptions/photos of them) and the trial court's rulings. Also, each side presents an appeal brief, which will generally include a statement of facts, pointing out ones it thinks favorable to its views. In civil cases a jury may be asked/instructed to give yes/no answers to a series of questions, but this is not normal in criminal cases. An appellate court can (and sometimes does) rule that there was not sufficient evidence to permit any reasonable jury to convict; to that extent it can rule on questions of fact. But, as the comment by ohwilleke mentions, an appellate court does not hear new evidence. It can overturn the conviction and send the case back for a new trial, and in such a new trial additional evidence may be introduce at the trial court level.
Senators, and anyone else for that matter, can ask any questions they want. The witness is required to answer the questions only if under subpoena, and only if the answer of the question would neither require disclosure of privileged information nor violate a 5th Amendment right (which is a form of privilege). Many things that are the subject of an NDA are not privileged information, and the fact that someone claims that something is a trade secret does not automatically make it privileged information. Privileges can be established by statute, court rule or at common law.
Are defendants legally obliged to provide all culpatory evidence to prosecution? The question here is whether or not all evidence requested by prosecution must be provided by the defense? If the defense plans on only using the evidence of the prosecution, does the prosecution get to demand evidence the defense would rather not release? No. Usually only specific kinds of evidence related to specific kinds of claims such as alibi evidence, an insanity claim, or expert testimony must be disclosed prior to trial by a defendant in a criminal case. A defendant in a criminal case does not have to disclose evidence harmful to the defendant's case prior to trial as a general rule. Sometimes there is a requirement to disclose witnesses anticipated to be called, or exhibits to be possibly used very shortly prior to trial, but that is more the exception than the rule. Does the answer depend on the whether or not the case is criminal or civil? Yes. A plaintiff in a civil case can compel disclosure prior to trial of all evidence in the custody, control, or possession of the defendant that is relevant or is reasonably calculated to be relevant to a disputed issue identified in the complaint, answer, and other pleadings (e.g. counterclaims, replies to counterclaims, third-party complaints, cross-claims, etc.). The scope of discovery is slightly different in jurisdictions that don't follow the federal model. This can include pre-trial depositions of the parties, although a defendant can claim the 5th Amendment at the risk of being exposed to an adverse inference communicated to the jury at trial if the defendant does so. Furthermore, most jurisdictions require the pre-trial disclosure of expert testimony that will be used at trial, of exhibits that will or may be used at trial, of witnesses who will or may be called a trial, of all documents that are relevant to a disputed issue identified in the complaint, answer, and other pleadings, of all insurance coverage that could cover the claim, of all persons with knowledge of the disputed facts, and of an expected damages calculation. In the federal system, however, one need pro-actively disclose only witnesses and documents that support your case without being asked. Is there consistency on this or is it at the discretion of the judge? The rules of procedure applicable to a case govern the scope of discovery, but judges have considerable discretion to determine that requests are excessive relative to what is at stake in the case, are irrelevant, or unduly burden some other legitimate interest of the person subject to discovery. Is there punishment for non-compliance? Yes. First of all, a failure to disclose when there is a duty to do so is a ground to exclude presentation of that evidence at trial. Secondly, in civil cases, attorney fees incurred to obtain the discovery can be awarded, facts that might have been disclosed can be declared to be true as a matter of judicial sanction where there is not disclosure, claims can be dismissed, etc. The main relevant federal rule in civil cases is Federal Rule of Civil Procedure 37. It is an unlawful request that must nonetheless be followed with only a hypothetical remedy left to the defendant as is the case in most of these united states to comply with an obviously unlawful arrest that doesn't present an immediate threat to life? I don't understand this long and convoluted sentence. The part about an unlawful arrest seems divorced from the issues in the rest of the the question. It isn't clear what kind of unlawful request is involved either.
It depends on the particular law in the particular jurisdiction in which you are charged. Most statute laws enumerate the defences that are available. In common law countries there is a general defence that (except in strict liability offences) the perpetrator must well ... perpetrate the criminal act; what you describe does not appear to meet that requirement. Other jurisdictions would not be so forgiving.