Is there double jeopardy protection for a Contempt of Congress conviction? So a person is subpoenaed by Congress to provide documents and give a deposition. The person refuses, is indicted and convicted. Can the person then be subpoenaed again for documents and testimony and then go through the process (indictment, conviction, etc) again. In other words, aside from the 1 year maximum sentence and small monetary fine for a contempt charge, is there anything else Congress can do to compel the provision of evidence (a warrant be issued for documents, etc.)?
Double jeopardy applies to the same facts, not to the same sorts of crimes. Say if you are tried and acquitted of murder of person A, that won't later save you from being tried for murder of person B. Same applies to your question: if the documents/testimony on the second occasion are different from the first occasion, there is no protection. If they are the same, there is.
The question actually asked, "what legal theories would support or harm...", is somewhat unclear. But what the questioner seems to be asking is, basically, what would happen if you tried it? The answer, it seems to me, is pretty straightforward. In the hypothetical case, you have been publishing a notice for years, saying "I have not been served with a subpoena." You then get served with a subpoena that includes a gag order. The gag order, presumably, includes wording prohibiting you from revealing the existence of the subpoena. You then cease publication of the warrant canary. By doing so, you have revealed the existence of the subpoena, and you are in violation of the gag order. You will be subject to whatever penalties you would be subject to if you violated it in some other way; for example, by publishing a notice that said, "Hey! We got a subpoena! It's a secret!" The distinction between revealing the existence of the subpoena by action, rather than by inaction, is a false one. It's exactly the kind of cutesy legal formality that non-lawyers love to rely on, but real judges ignore. If you tell someone: "Hey, you know John Smith's three sons, Joe, Ted, and Bill? Joe and Ted are good people; they have never molested any children. As for Bill--well, I don't have anything to say about Bill." If Bill is not a child molester, you have defamed him, and you are not going to convince a judge otherwise. The EFF link you link to tries to claim it'll "work" because courts are reluctant to enforce speech. Even if that were true, that might mean your canary would be effective in the sense of giving the public notice of the subpoena. That doesn't mean you wouldn't be liable for giving the public notice. For example: I put up a billboard saying "Bill Smith is a pedophile." Even if the court can't force me to add the word "not", that doesn't mean the billboard isn't defamatory. Realistically, though, courts compel speech all the time. Court-ordered apologies, disclosures, and notices are not unusual. And if ever a court would be inclined to compel speech, it would be in a situation like this one, where a company intentionally set out to get around a gag order with this kind of convoluted sea-lawyering.
Documents are not protected under the 5th Amendment, so a person can be compelled to produce documents that may incriminate them. The person cannot be forced to testify against themselves, however – they can invoke their right to not testify against themselves. The attorney-client privilege canon has some exceptions, for example (4) to secure legal advice about the lawyer's compliance with these Rules or (2) to prevent the client from committing a crime or fraud that is reasonably certain to result in substantial injury to the financial interests or property of another and in furtherance of which the client has used or is using the lawyer's services (bearing in mind that POTUS is required by law to turn all documents over to the national Archives, so turning the records over is &quot;compliance with the law&quot; and a think that an attorney would do for their client, though this event is quite belated). No subpoena was issued and no testimony was given, so the Fifth Amendment is irrelevant.
Is this normal? Pretty much. Witnesses lie in court all the time (in my experience, defendants, law enforcement officers and medical doctors are the most likely to lie). Dealing with a witness who lies in court under oath effectively is one of the most challenging tasks lawyers face. It is an inherently challenging hurdle to proving or defending a case. The facts as presented in court often differ in some material way from reality. It is a pretty tough thing to accurately measure, but my gut estimate would be that this happens in a least 30%-40% of cases that produce contested trials, although not infrequently, a judge or jury will not find the false testimony to be credible. On the other hand, it isn't at all uncommon (probably at least 10% of the time) for a judge or jury to believe the liars to be telling the truth, and to find the people who are telling the truth to be less credible. There is absolute immunity from civil liability for lying in court testimony, although it could, in theory, give rise to contempt of court sanctions from the judge in some circumstances, or to a prosecution for perjury. But, perjury prosecutions are, in practice, very rare, and a good share of them arise from false statements made in documents under oath, rather than from courtroom testimony. There is probably less than 1 perjury prosecution per 1000 provable lies made under oath in courtroom testimony on material issues that end up influencing the outcome in a case. I totally sympathize with how frustrating this situation is having been there in cases that I am litigating many, many times. But, in short, life isn't fair.
In the U.S., one trial can be held for multiple co-defendants, though prosecutors and defense attorneys will have reasons for seeking separate trials (If only to avoid having a scene similar to the on in Dark Knight where Harvey Dent has about 50 mobsters caught in one RICO violation plus their lawyers and the judge's simple question of &quot;How do you plea?&quot; is met with a din of responses.). The Defense's reason for this is that an individual may not have been a part of every step of the collective guilt and thus some charges might not be appropriate if it's an individual's guilt compared to a groups guilt. For example, the six police officers involved in the 2015 death of Freddie Gray at trial were all tried separately. The first trial was declared a mistrial over the hung jury, and two subsequent trial's resulted in findings of not guilty by a judge during a bench trial. The remaining individuals had charges dropped (The three officers who had yet to have trials plus the one officer whose trial resulted in a mistrial). One of the findings a running theme of the officers as individuals did nothing wrong, though had they been tried collectively, the results may have been different, since the individual trials meant certain facts couldn't be brought up as they didn't apply to the individual but did if they were tried as a group. From a prosecutor's standpoint, separate trials mean that you can use one suspect against the other and make a deal for lighter charges in exchange for testimony against a partner in crime. The U.S. legal system does allow for plea deals between the defense and prosecution (and while it's not the only nation that allows this, it's one of the few where plea bargaining is not viewed as a &quot;dirty&quot; tactic and is openly embraced (U.S. attorneys tend to hate going to trial and will try to avoid it.). Prosecutors are not above offering immunity or granting lighter sentences in exchange for help in other cases, often in the form of testimony against the big fish. For a criminal who believes &quot;snitches get stitches&quot;, an offer of flipping on your co-defendant for a sentence of 10 years, with parole in 5 is nothing to sneeze at when you're looking at 25 to life without parole for what you did. It's not immunity for testimony (typically, witnesses in plea bargains are not allowed to take the 5th with respect to questions on the stand because they will typically plea before the trial, and thus can't be prosecuted for the same crime.).
(assuming United States law here, though I'd be surprised if it were significantly different in other jurisdictions with such restrictions) Your friend is incorrect: that would be a new offense, for which Person A could be prosecuted anew. If your friend's logic were correct, once a person is convicted of robbing a store, they'd be free to rob that store without repercussions for life. It's worth noting that the conviction isn't relevant: the prohibition of double jeopardy in the United States prevents even multiple prosecutions (except, in some cases, for separate state and federal prosecutions or foreign prosecutions).
Yes, you can be compelled by the government to reveal information: All it takes is a judge agreeing with a plaintiff or prosecutor that it has some relevance to a complaint over which the court has jurisdiction. If that point arrives and you want to protect that information you only have three choices: Get a legal team good enough to convince the court otherwise. Face the consequences of contempt of court for failing to supply the information requested. Flee to another jurisdiction before #2 happens.
Is there any precedent saying that a witness is immune to any crime he admits to while being a witness? Yes, there is precedent, but it unlikely to apply to your situation. The applicable type of immunity is called witness immunity. There are two types of witness immunity, transaction (aka blanket immunity) and use immunity. Both must be granted by the prosecution. Check out this article on Nolo-Legal for a description of the two: http://www.nolo.com/legal-encyclopedia/immunity-exchange-testimony.html Immunity can apply to a civil case, but the prosecution's grant of immunity must specifically say so. See Pillsbury Co. v. Conboy, 459 U.S. 248, 263–64 (1983). While there is authority for witness immunity in civil cases, the witness would be unlikely to get it. Generally, the prosecution provides immunity when they need testimony from a witness and that witness asserts their 5th amendment right against self incrimination. By providing immunity, the prosecution removes the 5th amendment concerns and the witness can then be compelled to answer the prosecution's question. This process is explained in more detail in this article. http://www.nolo.com/legal-encyclopedia/when-prosecutors-grant-immunity-what-does-immunity-grant-mean-the-witness.html Given the way in which immunity is granted to witness, it is most likely to happen in civil cases where the government—not a private party—needs a witness's testimony. For example, a civil case brought by the government for a consumer protection, anti-trust, or securities law violations against a company. Also, the witness might want to know the statute of limitations for under-aged possession of alcohol. If it lapsed there would be no need for immunity.