Is it a valid attorney strategy to make statements, even if they will be striken from the record? Similar to how, in football/soccer, players strategically go for fouls because they're effective. Is it common practice for an attorney to bring up inadmissable evidence/points that, even though they might be stricken from the record, will inevitably have an effect on the jury? As a simple example, if there was illegally obtained evidence on the defendant, then it couldn't be officially admitted and discussed in the court. But if the prosecution brought it up, it would &quot;poison&quot; the minds of the jury, even if it was ordered to be stricken from the records.
canada When faced with improper statements made in front of a jury, the judge has three options: provide a correcting instruction to the jury, to strike the jury and continue alone (in civil matters), or to declare a mistrial. Mistrial would be the appropriate remedy if the effect of the statements is so improper and prejudicial that it cannot be corrected by the judge's instructions to the jury to ignore them. See e.g. R. v. Armstrong (1969), [1970] 1 C.C.C. 136 (N.S.C.A.). A witness made an improper reference to an accused's confession. The only effective remedy was a mistrial. Whether this is the case is a matter of discretion left to the trial judge.
united-states This answer is based upon general principles of criminal procedure in the United States which are quite similar in most states, although not necessarily exactly identical. The answer is likely to be different in other jurisdictions. If inadmissible evidence is offered by the prosecution and admitted at trial, this is a ground upon which the defense can move for a mistrial (which due to double jeopardy amounts to an acquittal), or upon which the defendant can appeal the conviction of the jury, if convicted. Acquittals of a defendant at trial cannot be appealed by the prosecution. But, to appeal, the error in admitting inadmissible evidence must be contemporaneously objected to by the defendant's lawyer (or the defendant if the defendant is not represented by counsel), or the admission of the evidence must be &quot;plain error&quot; (which is very rarely met on evidentiary issues). If the defendant's lawyer doesn't promptly say &quot;I object&quot; that ground for contesting a conviction is usually lost. Even then, the standard of review on appeal is whether the judge abused the judge's discretion in admitting the evidence, not whether the appellate court would have ruled the same way if presented with that evidentiary question. Also, even if there is an error, a conviction on a particular count will not be overruled if the error was &quot;harmless&quot;, which is to say that there is a reasonable possibility that admitting the inadmissible evidence caused the defendant to be convicted of that count. Often, if the evidence is overwhelming, or the inadmissible evidence wasn't that prejudicial, a conviction will be affirmed notwithstanding the admission of inadmissible evidence. Sometimes harmless error is evaluated considering all of the errors at trial as a whole, rather than individually, in addition to all of the other evidence admitted at trial. If an evidence issue can be foreseen and is central to the case (e.g. suppression of evidence of possession of drugs in a drug possession case), the issue of the admissibility of the evidence will often be resolved in a pre-trial hearing and subject to appeal then, prior to trial, rather than being resolved in the trial itself where the prosecution has no right to appeal, and the defendant risks conviction if the ruling goes against the defendant. If the conviction is overturned on appeal, the usual remedy is to remand the case to the same judge to conduct a new trial with a new jury, in a manner consistent with the appellate court's rulings.
Laws criminalizing perjury are not about being mistaken or less believable in your testimony. The crime is, very narrowly, stating something which you do not believe to be true, while under oath. If you make a statement that happens to be untrue but you believe it is true (you are mistaken), that is not perjury. In the US, moreover, you have to assert something literally untrue, not simply say something that could be interpreted as being untrue. Rental arbitration hearings are nothing special, except that witnesses may or may not be sworn under the particular state's laws. If a witness is sworn and unambiguously asserts "Jones gave Smith $1,000 at that time", and another sworn witness asserts "Jones did not give Smith any money at that time", that might suggest that one witness testified as to something that they did not believe to be true. It might also show that they were standing in different places. Even if the circumstances show that the two witnesses observed the same facts, you would have to prove beyond a reasonable doubt that one party knew at the time that their statement was false. It is also possible that one witness made mis-remembered or misinterpreted what they saw. They might say or write something else (under oath, or elsewhere) that establishes that they knew better. An example is US v. DeZarn, which clearly established that the defendant could not have believed the statement that he testified to. With no official record of what a party testified to, it may not possible to establish beyond a reasonable doubt that a party committed perjury, since it can be reasonable to doubt claims of what he actually testified to. The defendant's attorney may, however, have to create such a doubt. Some answers could be perjurous if the question and answer are short enough, for example "Did you cash the check?" "No", if witnesses to the hearing testify convincingly that this exchange took place.
The jury would never hear the recording The recording and its provenience would be provided to the prosecution who would, rightly, have issues with its admissibility. The defence and prosecution would make submissions on this to the judge, normally well before the trial date and the empaneling of the jury. If the recording had genuinely emerged during the trial, such submissions would be made without the jury seeing them. The submissions would typically be in writing rather than verbal. If the judge decided the evidence was inadmissible the jury would never see it and never know of its existence. If the jury somehow found out about it anyway, this would be grounds for an immediate mistrial and we would start again with a new jury. Illegally obtained evidence is not automatically inadmissible Hong Kong is not the United States - admitting or excluding illegally obtained evidence is at the discretion of the judge based on where the interests of overall justice are best served. In any event, the absolute prohibition in the US applies only to prosecution evidence - evidence illegally obtained by the defence is subject to the same rules as in Hong Kong; the judge decides.
Only if counsel challenged the point during the trial Difficult as it might be, you can’t allow the judge to be wrong during the trial without calling them on it: very, very politely. For example, there is case law that says you can’t successfully appeal because the judge was asleep through significant parts of the trial; appeals courts are clear that you have to wake them up. If you don’t then you accepted that you didn’t want the judge to hear the parts of the case they slept through, it’s your choice how you present your case. Frankly some cases are better if the judge misses half the evidence. Of course, if the error of law makes it through to the oral or written judgement then you can appeal even if you didn’t take issue with it.
Can a jury render a verdict that contravenes with binding precedent? Yes, but (if it is a guilty verdict) it will be overturned on appeal. The appeal court will say that the jury's verdict was not one which any reasonable jury could have made on the basis of the evidence and the instructions in the case. As explained in Dave D's answer, the trial judge will have explained the law, including the binding precedent, to the jury. So if we get to this stage then the jury is disregarding instructions. The above process is the remedy. You may notice a 'gap' where the jury can unlawfully acquit a person and there's nothing anyone can do about it, because of the rule against double jeopardy (that is, you can't appeal against an acquittal). This is called jury nullification, because the jury has nullified the relevant criminal law by acquitting an offender.
Perjury is not 'not telling the truth'. It requires (in most jurisdictions) being proven to have deliberately lied under oath. As Xavier pointed out, you are not on oath when entering a plea (among other reasons, you would be required to incriminate yourself). Secondly, "I am not guilty" could mean anything from "the prosecution wrongly think that what I did is illegal" to "this law is unconstitutional" even if the facts are not in dispute; either may be mistaken without being a lie. If the facts are in dispute, the jury will have to deliver a verdict that implies (it does not state, let alone prove) that they disbelieve one party; deliberate falsehood, whether by a defendant or a police officer, would be several steps beyond that.
"I don't recall" will protect you from perjury only if it's true. Let me try an example. You're asked: "Did Mr. Blatter hand you an envelope full of cash?" You say: "Not to my recollection." Now the government introduces a videotape of you receiving and counting the money, and a thank-you note you wrote to Blatter saying "Thanks for the awesome bribe!" You can defend yourself from perjury charges if you can convince the finder of fact that you had forgotten all of those things...but it's not very likely, is it? "I don't recall" isn't a magic bullet. It's like any other statement: it's perjury unless it's true.