Can an expert refuse to give expert testimony? Can an expert be forced to give expert testimony with the use of a subpeona? Seeing as they are putting there reputation on the line it would not strike me as unfair to force a professional into forensic testimony?
united-states Yes and no, that is, the courts have extensive powers to compel testimony, but there are rules about doing so. This article addresses the question of expert testimony. Suppose you want an expert to testify, then Rule 26(a)(2)(B) applies, requiring disclosure of the information to be disclosed, along with a written report. It could be nearly impossible to provide the required information without the cooperation of the expert. Furthermore, under Rule 45(d)(3)(B)(ii), a subpoena can be quashed, which the article summarizes in terms of the objections that Testimony about an expert’s findings may impact or limit an expert’s ability to conduct research Testimony about an expert’s work may be unethical, if the work is not completed, peer reviewed, or otherwise in a “publishable” format The subpoena and resultant testimony could put the expert at a competitive disadvantage Work required to adequately prepare for such testimony is overly burdensome The subpoena and subsequent testimony may put the unwilling expert in a controversial or otherwise uncomfortable position In a specific instance of subpoenaing an involuntary witness, the court in In Re: World Trade Center Lower Manhattan Disaster Site Litigation addressed a motion to compel expert testimony. The opinion lays out various powers of the court to compel a &quot;non-retained&quot; expert witness, including the &quot;substantial need for the testimony or material that cannot be otherwise met without undue hardship&quot;. There is a complex weighing of factors here, which is resolved at the finding that &quot;Plaintiffs have failed to show that the Non-Retained Experts' testimony is unique&quot; so the petition to compel testimony was denied, but the affiliated research center was compelled to disclose the underlying data. So it depends on the circumstances, see Kaufman v. Edelstein, 539 F.2d 811.
In all likelihood, the judge's order related to data collection and reselling is not legally enforceable. They weren't parties to the expungement action, so the judge doesn't have jurisdiction over them. And, the First Amendment protects the right to say truthful things pretty absolutely. Arguably, if the sites provided the information without making clear that it might not be current because records were expunged or corrected, there might be a claim for negligent misrepresentation, false light, or even defamation, but I seriously doubt that even those claims would hold up. The language in the order might cause sites to comply out of not legally justified concern, or just a desire to be accurate, even if it is not enforceable. So, it doesn't hurt to bring that information to the attention of such sites and ask them to take down the information. But, when push comes to shove, I very much doubt that you would prevail in court enforcing that order against them. Certainly, if you do nothing, they will do nothing, because they are not psychic and have no idea that the court order related to those records has been entered. Even a valid and enforceable order directed at a party over whom a court has jurisdiction is not effective until the person ordered to comply with it has notice of the order. And, there is no system that gives sites like that notice without you taking action to inform them of an order.
A witness who disobeys a court order has automatically broken the law. Indeed, this is the most fundamental of laws; you can't decide "If I turn up to the hearing I may be punished for my crime; but not attending isn't against the law, so goodbye." A witness who goes out of the jurisdiction cannot, of course, be punished while there (though when he returns he may have to explain why he chose to leave having been warned that he must attend or face penalties- that is the meaning of sub poena). But your assumption that anybody who fails to attend probably had a good reason betrays a fundamental, though common, misunderstanding. A court has determined that your evidence is necessary for justice to be done. There is therefore no good reason not to attend. It may well be that a doctor would prefer that you did not go to court that day, and if you apply to the court it may be possible to find some arrangement. But you are not allowed to decide 'my convenience is more important than discovering whether the defendant should go to jail or not". Civilised countries have people who are empowered to make that decision; they are called judges, and the decision has been made.
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.
Yes, one should not publish evidence until a verdict is reached. This includes any possible appeals. In common law, doing so has long been one of the contempt of court offences called sub judice, or &quot;publishing information that interferes with a fair trial&quot;. The main point is that the jury should not be influenced by any information other than what they hear in the courtroom. In New Zealand, the offence was recently codified.
The Fifth Amendment right against self-incrimination applies only in criminal trials, but it permits a witness to refuse to answer a question in either criminal or civil cases, including in a deposition. If he had committed crimes or thought that his answers might have incriminated him, he should have declined to answer. I'm not terribly familiar with this case, but it occurs to me that a lot of the allegations against Cosby go pretty far back; it could be that he was talking about something so far back that he wasn't exposed to any criminal liability. In a case like that, it may even be that a judge had already ordered him to answer the question. Assuming that he voluntarily answered the question, he has waived his right against self-incrimination and the testimony is generally admissible.
You give no jurisdiction but in general: First, police have no obligation to be honest. So, yes they can collect this without consent by e.g. taking hair from your hairbrush (with a warrant) or giving you a glass of water while interviewing you and getting it from your fingerprint oils (which may not actually be technically possible but never mind that). No, they can't take it by "force" by sticking a swab in your mouth. Yes, it will almost certainly go into a database. Of course, there are some jurisdictions where police are entitled to decide you are guilty based on the fact that you didn't pay them a bribe.
Your confessions, to anyone, can be used against you. If A admits to B that A stole the car, B can testify to what A said. In fact, if B accuses A of a crime and A says nothing (and C witnesses this), C can testify as to what B and A said (or didn't say) – this is known as an adoptive admission, and it is up to the jury to decide if they think the silence is significant. Recordings are likewise admissible. All evidence is in principle defeasible, so if there is a video of "you" committing a crime, you can make the case that it wasn't really you, and the jury will weigh the evidence to see if they are firmly convinced that you did commit the crime (at least in New Jersey... long story about 'burden of proof').