How has the “but for” test proven inadequate where two defendants jointly cause an injury that would have occurred even if only one of them had acted? Source: p 200, Thinking Like a Lawyer: An Introduction to Legal Reasoning (2010, 2 ed) by Kenneth J. Vandevelde This “but for” test has proved inadequate where two defendants jointly cause an injury that would have occurred even if only one of them had acted. For example, if two men negligently discharge firearms, both of which fire fatal shots into the victim, in a lay sense of the term both men “caused” the injury. Yet by applying the “but for” test, neither man can be shown to have caused it. If the first man had not fired his weapon, the victim would still have been killed by the second shot. Thus, one cannot say that but for the first man’s negligence, the injury would not have occurred. The same reasoning exonerates the second man as well. [1.] The “but for” test, in other words, would absolve both gunmen of liability for the shooting. Accordingly, many courts have adopted a rule that provides an alternative definition of actual causation. Under this rule, a defendant’s breach of duty is considered the actual cause of an injury if it was a substantial factor in bringing about the injury, even though the breach may not have been the “but for” cause. The outcome of applying this test to the shooting circumstances would be that either of the two gunmen would be considered the cause of the death. Why is 1 true? Why cannot both shooters be found liable for the shooting?
They both can be found liable, but not by using the but-for test. Suppose that person A and person B each independently negligently discharge firearms and that each on its own would be sufficient to kill person C. Is it true that, "but for the actions of A, C would still be alive?" No. Is it true that, "but for the actions of B, C would still be alive?" No. Using the but-for test would not be able to assign liability to either A or B. "But for" is not an obvious phrasing for non-native English speakers. It's the same as asking, "If it were not for the actions of A, would C still be alive?". However, courts and juries are not limited to using the but-for test for causation. See Corey v Havener, 182 Mass. 250 (1902): It makes no difference that [...] it is impossible to determine what portion of the injury was caused by each. If each contributed to the injury, that is enough to bind both.
No. Double jeopardy would not apply. You can't be prosecuted twice for committing the same (or a lesser included crime) arising from the same incident twice. If you commit a new crime you can be prosecuted for that new offense, even if you were acquitted of committing a similar offense at a different time and place in the past.
This determination is largely a facts and circumstances specific test to be evaluated with little additional legal guidance by the judge or jury faced with evaluating the question (usually a judge in the way that the issue usually presents itself). Like many fairly vague legal standards, it leaves open the possibility that there will be inconsistent rulings on this question in circumstances presenting similar facts.
Courts have inherent jurisdiction to reconsider/recall their own decisions. This rarely happens (especially if the decision has already been &quot;sealed&quot; i.e. issued in writing) but still possible. The principle of finality only applies to parties asking courts to reconsider; it does not constrain courts themselves. So, in this example, &quot;the judge agrees to vacate them&quot; but that decision hasn't been sealed yet. The judge can easily just change their mind (although, again, it rarely happens). No double jeopardy applies because it is still the same trial.
This is known as a retroactive or ex post facto law. Such laws are explicitly forbidden by the US Constitution (Wikipedia reference), and are generally frowned on in jurisdictions where the rule of law applies, partly because it is difficult to prove criminal intent when your action was not at the time criminal.
You are quoting standards that are applicable during an appeal. So in this case, the defendant was brought to trial, was found guilty by a jury, and is now appealing that conviction. During that initial trial, the evidence was supposed to have been weighed neutrally. In an appeal, the appellate court is not attempting to re-litigate the entirety of the case. That would be costly and slow in addition to burdensome on witnesses that might have to be called again to testify. Instead, it defers to the trial court for things like the determination of facts. The standards you quote show that an appellate court is only going to overturn a lower court's verdict as insufficient if the lower court's ruling is manifestly unjust. The prosecution and the defense presented evidence on a particular element of the crime at trial. The jury determined that the prosecution met its burden, and proved the element beyond a reasonable doubt. The appeals court is not going to substitute its judgement for that of the jury particularly when the jury had the opportunity to assess the credibility of different witnesses that may not be possible from a simple text-based transcript. If the trial court convicted and the appeals court determines that the conviction was reasonable if the evidence was viewed from the standpoint most favorable to the prosecution, then the sufficiency standard would be met and the appeal would be denied. The appeals court would only overturn the verdict as insufficient if no reasonable juror could possibly have concluded that the state met its burden of proof given the evidence presented.
I think it would depend on how a jury viewed the "challenge" to her audience. The general rule for self-defense in Texas is that the person needs to reasonably believe that force is immediately necessary to protect herself from someone else's use of force. I think a jury would find it reasonable to believe that someone forcefully attempting to steal your gun was planning to use it against you. More importantly, the law generally presumes that that belief is reasonable if the person is being robbed, assuming that she isn't otherwise engaged in criminal activity. Since openly carrying an AR-15 is -- as far as I know -- legal in Texas, I think she'd probably be fine. But: The law also says that the use of force is not justified when a person consents to the other person's use of force, or if the person has provoked the other person. So now you have the question of whether the student's challenge constitutes a provocation or consent to the use of force. I think you can make a decent argument for provocation, which means that "the defendant did some act or used some words intended to and calculated to bring on the difficulty in order to have a pretext for inflicting injury." Neal v. State, No. 12-14-00158-CR, 2016 WL 1446138, at *11 (Tex. App. Apr. 13, 2016). You might also make out a decent argument for consent, which doesn't necessarily seem to require that the parties exactly spell out the rules of engagement, just that there is some kind of agreement between the two parties. In one case, for instance, a defendant tried to argue that a fight had gone beyond the rules because one party used a chokehold and knocked the other out. But the court said that the only actual rule agreed to was that there would be no weapons used. Padilla v. State, No. 03-07-00513-CR, 2008 WL 5423139, at *2 (Tex. App. Dec. 31, 2008). That makes me think that as long as there's consent to some kind of fight, you don't necessarily need rules, though you do need to abide by them if you agree to them. So what's the scope of consent in this case? If we say that she's agreed to the use of force by challenging people to take something from her, and she hasn't said how you can do it, can you do it by any means you choose? I don't think a court would let someone shoot her to get it, but maybe they would be allowed to pry it out of her hands. So all of that is a long way of saying that this is a tricky question, and that any decision would probably depend a lot on the specific facts of who she was talking to, what exactly she was saying, how she was carrying the gun, and so on.
The defense lawyer has the duty to do the best for his client. The client will be convicted if he or she is guilty beyond reasonable doubt. If the lawyer can create a reasonable doubt and manages to free his client then he has done a good job. So yes, if the lawyer knows that some other person might have committed the crime, to the degree that it creates reasonable doubt, then the lawyer must raise this. Of course if it turns out that there is just some phantasist making wild accusations, that might not be helpful.