What is the Mississippi Law and Federal Law against incest? What is incest legally and what punishment applies?
The Mississippi general prohibition against incest is that Persons being within the degrees within which marriages are prohibited by law to be incestuous and void, or persons who are prohibited from marrying by reason of blood and between whom marriage is declared to be unlawful and void, who shall cohabit, or live together as husband and wife, or be guilty of a single act of adultery or fornication, upon conviction, shall be punished by imprisonment in the penitentiary for a term not exceeding ten (10) years. The degree of relationship declared to prohibit marriage is defined as (1) The son shall not marry his grandmother, his mother, or his stepmother; the brother his sister; the father his daughter, or his legally adopted daughter, or his grand-daughter; the son shall not marry the daughter of his father begotten of his stepmother, or his aunt, being his father's or mother's sister, nor shall the children of brother or sister, or brothers and sisters intermarry being first cousins by blood. The father shall not marry his son's widow; a man shall not marry his wife's daughter, or his wife's daughter's daughter, or his wife's son's daughter, or the daughter of his brother or sister; and the like prohibition shall extend to females in the same degrees. All marriages prohibited by this subsection are incestuous and void. In the US, incest laws are at the state level, not the federal level.
There is a federal law, 18 USC 2252, which criminalized distribution and receiving of child porn. One part of the law addresses a person who (1) knowingly transports or ships using any means or facility of interstate or foreign commerce or in or affecting interstate or foreign commerce by any means including by computer or mails, any visual depiction, if— (A) the producing of such visual depiction involves the use of a minor engaging in sexually explicit conduct; and (B) such visual depiction is of such conduct; The next part addresses one who (2) knowingly receives, or distributes, any visual depiction using any means or facility of interstate or foreign commerce or that has been mailed, or has been shipped or transported in or affecting interstate or foreign commerce, or which contains materials which have been mailed or so shipped or transported, by any means including by computer, or knowingly reproduces any visual depiction for distribution using any means or facility of interstate or foreign commerce or in or affecting interstate or foreign commerce or through the mails, if— (A) the producing of such visual depiction involves the use of a minor engaging in sexually explicit conduct; and (B) such visual depiction is of such conduct; The word "knowingly" is crucial here: it may mean that if you don't know, it's not a crime. The wording is not completely clear, in that maybe the law only says that you have to know that you received and don't have to know anything about the item that you received. So it is up the the Supreme Court to say exactly what that means. In US v. X-Citement Video, Inc., 513 U.S. 64, they did. The court held that "knowingly" does not just mean that you know you are receiving or distributing, because that would yield absurd results such as that a retail druggist who returned a roll of film unprocessed would be guilty of distributing child porn, just in case the film contains child porn. As the court says, "We do not assume that Congress, in passing laws, intended such results". There is a general constitutional presumption that any crime has a scienter requirement (Morissette v. United States, 342 U. S. 246, Staples v. United States, 511 U. S. 600): "the standard presumption in favor of a scienter requirement should apply to each of the statutory elements that criminalize otherwise innocent conduct". The court rejects the narrow interpretation that "knowingly" just applies to the verb, and "This interpretation is supported by the canon that a statute is to be construed where fairly possible so as to avoid substantial constitutional questions". There are also state laws which are untouched by X-Citement, which may make possession of child porn a strict liability offense. Washington state law is written so that you have to know or intend ("Knowingly develops, duplicates, publishes, prints, disseminates, exchanges, finances, attempts to finance, or sells a visual or printed matter that depicts a minor engaged in an act of sexually explicit conduct as defined in RCW 9.68A.011(4) (a) through (e)" or "Possesses with intent to develop, duplicate, publish, print, disseminate, exchange, or sell any visual or printed matter that depicts a minor engaged in an act of sexually explicit conduct as defined in RCW 9.68A.011(4) (a) through (e)".) The statutory rape law on the other hand has no requirement pertaining to knowledge or intent (1) A person is guilty of rape of a child in the third degree when the person has sexual intercourse with another who is at least fourteen years old but less than sixteen years old and not married to the perpetrator and the perpetrator is at least forty-eight months older than the victim. I don't know whether some state's statute was written without a "knowingly" requirement.
Against Bob: yes; Against Cindy: no I'm going to borrow @Trish's example because it's a good one although the conclusions they reach are wrong. Alice made a green box. Bob signs an NDA never to tell anyone that Alice made a green box, and there is a clause in it that if the NDA is breached, the box is red. Bob tells Cindy that Alice made a green box. Cindy has a patent on making green boxes. Cindy sues Alice and in the lawsuit puts Bob on the stand. Situation 1 So, the box is objectively green and objectively a breach of Cindy's patent on green boxes. Bob is on the stand and is required to answer questions honestly and no contract can prevent him from doing so. He testifies that the box is green. This would be a breach of contract except that a clause that requires a breach of the law (perjury in this case) is void for public policy reasons so Bob cannot be sued for this. However, he can be sued for the initial breach - he may have a public policy defense here because Alice was breaking the law, however, it’s easy enough to construct a scenario where Alice was innocent but suffered loss from Bob’s disclosure. Cindy can say what she likes because she is not bound by the NDA. Cindy wins, Alice loses. Situation 2 Cindy dies - after a long and happy life so we won't grieve too much. To Bob's surprise, he inherits Cindy's green box patent of which he was previously in complete ignorance of. Bob sues Alice for breaching Cindy's now his, patent. So, the box is objectively green and objectively a breach of Cindy's patent on green boxes. However, Bob agreed with Alice in the contract that the box is red and so, legally for matters between Alice and Bob the box is legally red (notwithstanding that everyone knows it's green) and is not in breach of Bob's patent. This sort of stuff has a name - a legal fiction. Adoption is a legal fiction - adoptive parents are (legally) parents; biological parents of adopted children are (legally) strangers. Alice wins, Bob loses.
Under 18 U.S.C. § 2423, transporting a minor across state lines is a crime when done with the purpose to engage in illegal sex or child pornography: (a) Transportation with intent to engage in criminal sexual activity. --A person who knowingly transports an individual who has not attained the age of 18 years in interstate or foreign commerce, or in any commonwealth, territory or possession of the United States, with intent that the individual engage in prostitution, or in any sexual activity for which any person can be charged with a criminal offense, shall be fined under this title and imprisoned not less than 10 years or for life. (b) Travel with intent to engage in illicit sexual conduct. --A person who travels in interstate commerce or travels into the United States, or a United States citizen or an alien admitted for permanent residence in the United States who travels in foreign commerce, for the purpose of engaging in any illicit sexual conduct with another person shall be fined under this title or imprisoned not more than 30 years, or both. (c) Engaging in illicit sexual conduct in foreign places. --Any United States citizen or alien admitted for permanent residence who travels in foreign commerce or resides, either temporarily or permanently, in a foreign country, and engages in any illicit sexual conduct with another person shall be fined under this title or imprisoned not more than 30 years, or both. I can't find anything suggesting that the intent to obtain an abortion would implicate this or any other law, though there have been attempts, such as the perennially introduced, but never-passed Child Interstate Abortion Notification Act.
Firstly, there is no jurisdiction in the US where rape is a potentially capital crime, and murder is not - so you are discussing a hypothetical (and rather implausible) jurisdiction. Given your jurisdiction is hypothetical, you can make the law be what you would like. Secondly, duress is accepted in almost all jurisdictions as a defence to a charge of anything except homicide (and some jurisdictions allow it to reduce the severity of a homicide charge). Courts can be reluctant to accept a charge of duress, but a bullet wound would probably be persuasive. I don't know if someone who had just been shot would be physically able to perform though. The precise crimes the perpetrator is guilty of would depend on your specific jurisdiction, but I would expect at least: rape (because they organized it) kidnap shooting the brother
I'm not sure what jurisdiction you're referring to, but here are the state involuntary manslaughter laws. Broad brush, the elements tend to be: Someone was killed as a result of act by the defendant. The act either was inherently dangerous to others or done with reckless disregard for human life. The defendant knew or should have known his or her conduct was a threat to the lives of others. However, you're really backwards planning from a jail vs. army decision, so you might actually be after something like felony hit and run, which can most certainly result in incarceration. The elements of felony hit and run generally include leaving the scene of an accident regardless of fault (hit and run typically becomes a felony when someone was injured in the accident). Since the elements vary from jurisdiction to jurisdiction, it makes sense to look them up wherever the accident will take place in the book. If it takes place in the U.S. this is a state-by-state compendium. Then you can tweak the story to satisfy the applicable elements and induce the jail vs. army decision (even if army policy prohibits it, it's still pretty common fiction!).
The law does not criminalize "having more than 1 legal spouse", it criminalizes specific behavior. The polygamy statute is here. It says Every one who (a) practises or enters into or in any manner agrees or consents to practise or enter into (i) any form of polygamy, or (ii) any kind of conjugal union with more than one person at the same time, whether or not it is by law recognized as a binding form of marriage, or (b) celebrates, assists or is a party to a rite, ceremony, contract or consent that purports to sanction a relationship mentioned in subparagraph (a)(i) or (ii), is guilty of an indictable offence and liable to imprisonment for a term not exceeding five years. That is, if you behave like you're married to multiple women, you've committed a crime.
This happened despite the fact that the marriage and Bible verses requirement were almost surely illegal and similar things have happened on and off, mostly in rural courts with non-attorney judges, for pretty much as long as the U.S. has been a country (and earlier). The trick is that the orders take effect unless someone appeals them, and since deals like this are usually a result of a plea bargain which waives rights to an appeal, and even if the result is simply imposed by the judge, one has to consider if taking the case up on appeal, having the sentence reversed, and then having it remanded to the same judge for resentencing would be worse from the perspective of the defendant, given the broad authority of a sentencing judge in a minor case like this one, than simply accepting the illegal sentence. Also, cases that aren't appealed never create precedents and aren't generally available among resources used by legal researchers, so they systemically evade documentation in easily available sources.