An expert witness, particularly in common law countries such as the United Kingdom, Australia, and the United States, is a person whose opinion by virtue of education, training, certification, skills or experience, is accepted by the judge as an expert. The judge may consider the witness's specialized opinion about evidence or about facts before the court within the expert's area of expertise, to be referred to as an "expert opinion". Expert witnesses may also deliver "expert evidence" within the area of their expertise. Their testimony may be rebutted by testimony from other experts or by other evidence or facts.
Polychlorinated biphenyls (PCBs) are highly carcinogenic chemical compounds, formerly used in industrial and consumer products, whose production was banned in the United States by the Toxic Substances Control Act in 1976 and internationally by the Stockholm Convention on Persistent Organic Pollutants in 2001.
Miller v. California, 413 U.S. 15 (1973), was a landmark decision of the U.S. Supreme Court clarifying the legal definition of obscenity as material that lacks "serious literary, artistic, political, or scientific value". The ruling was the origin of the three-part judicial test for determining obscene media content that can be banned by government authorities, which is now known as the Miller test.
In United States federal law, the Daubert standard is a rule of evidence regarding the admissibility of expert witness testimony. A party may raise a Daubert motion, a special motion in limine raised before or during trial, to exclude the presentation of unqualified evidence to the jury. The Daubert trilogy are the three United States Supreme Court cases that articulated the Daubert standard:
Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), is a United States Supreme Court case determining the standard for admitting expert testimony in federal courts. In Daubert, the Court held that the enactment of the Federal Rules of Evidence implicitly overturned the Frye standard; the standard that the Court articulated is referred to as the Daubert standard.
Admissible evidence, in a court of law, is any testimonial, documentary, or tangible evidence that may be introduced to a factfinder—usually a judge or jury—to establish or to bolster a point put forth by a party to the proceeding. For evidence to be admissible, it must be relevant and "not excluded by the rules of evidence", which generally means that it must not be unfairly prejudicial, and it must have some indicia of reliability. The general rule in evidence is that all relevant evidence is admissible and all irrelevant evidence is inadmissible, though some countries proscribe the prosecution from exploiting evidence obtained in violation of constitutional law, thereby rendering relevant evidence inadmissible. This rule of evidence is called the exclusionary rule. In the United States, this was effectuated federally in 1914 under the Supreme Court case Weeks v. United States and incorporated against the states in 1961 in the case Mapp v. Ohio. Both of these cases involved law enforcement conducting warrantless searches of the petitioners' homes, with incriminating evidence being described inside them. Consciousness of guilt is admissible evidence.
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled wet transformers, some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers. Its functions are to insulate, suppress corona discharge and arcing, and to serve as a coolant.
Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999), is a United States Supreme Court case that applied the Daubert standard to expert testimony from non-scientists.
The Project on Scientific Knowledge and Public Policy (SKAPP), based at the George Washington University in Washington, D.C., examines the nature of science and the ways in which it is both used and misused in government decision-making and legal proceedings. Through empirical research, conversations among scholars, and publications, SKAPP aims to enhance understanding of how knowledge is generated and interpreted. SKAPP's mission is to promote transparent decision-making based on the best available science in order to promote public safety and health.
Nixon v. Fitzgerald, 457 U.S. 731 (1982), was a United States Supreme Court case dealing with presidential immunity from civil liability for actions taken while in office. The Court found that a president "is entitled to absolute immunity from damages liability predicated on his official acts."
Time, Inc. v. Firestone, 424 U.S. 448 (1976), was a U.S. Supreme Court case concerning defamation suits against public figures.
Mitchell v. United States, 526 U.S. 314 (1999), is a United States Supreme Court case that considered two Fifth Amendment privileges related to a criminal defendant’s rights against self-incrimination in a Federal District Court. The court ruled that a defendant who waives the guilty plea does not also waive the privilege during the sentencing phase of the trial, and that the court cannot draw an adverse inference from the defendant's silence when determining facts related to the crime which affect the severity of the sentence.
State Oil Co. v. Khan, 522 U.S. 3 (1997), was a decision by the United States Supreme Court, which held that vertical maximum price fixing was not inherently unlawful, thereby overruling a previous Supreme Court decision, Albrecht v. Herald Co., 390 U.S. 145 (1968). However, the Court concluded that "[i]n overruling Albrecht, the Court does not hold that all vertical maximum price fixing is per se lawful, but simply that it should be evaluated under the rule of reason, which can effectively identify those situations in which it amounts to anticompetitive conduct."
Cipollone v. Liggett Group, Inc., 505 U.S. 504 (1992), was a United States Supreme Court case. In a split opinion, the Court held that the Surgeon General's warning did not preclude lawsuits by smokers against tobacco companies on the basis of several claims. The case examined whether tobacco companies could be liable for not warning the consumer "adequately" of the dangers of cigarettes as well as ultimately held the stance that smoking was in fact a free choice. The ruling also questioned the Cigarette Labeling and Advertising Act of 1965 to determine whether the warning labels on the cigarette products by law had to be less or more alarming than the warning issued.
James v. Illinois, 493 U.S. 307 (1990), was a United States Supreme Court case in which the Court forbade the admission of evidence obtained in violation of the Fourth Amendment for the use of impeaching statements made by a defense witness.
Taylor v. Illinois, 484 U.S. 400 (1988), is a United States Supreme Court decision in which the Court held that defense witnesses can be prevented from testifying under certain circumstances, even if that hurts the defense's case. Taylor was the first case to hold that there is no absolute bar to blocking the testimony of a surprise witness, even if that is an essential witness for the defendant, a limitation of the broad right to present a defense recognized in Washington v. Texas (1967).
Chambers v. Mississippi, 410 U.S. 284 (1973), was a United States Supreme Court case in which the Court held that a state may not enforce its rules of evidence, such as rules excluding hearsay, in a fashion that disallows a criminal defendant from presenting reliable exculpatory evidence and thus denies the defendant a fair trial.
Warger v. Shauers, 574 U.S. 40 (2014), was a unanimous decision by the United States Supreme Court, ruling that jurors may not testify about what occurred during jury deliberations, even to expose dishonesty during jury selection or voir dire. The Court delivered its ruling on December 9, 2014.
Monsanto was involved in several high-profile lawsuits, as both plaintiff and defendant. It had been defendant in a number of lawsuits over health and environmental issues related to its products. Monsanto also made frequent use of the courts to defend its patents, particularly in the area of agricultural biotechnology. Bayer acquired Monsanto in 2018, and the company has since been involved in litigation related to ex-Monsanto products such as glyphosate, PCBs and dicamba. In 2020 it paid over $10 billion to settle lawsuits involving the glyphosate based herbicide Roundup.
Buck v. Davis, 580 U.S. ___ (2017), was a case in which the United States Supreme Court reversed the death sentence of the defendant Duane Buck after the defendant's attorney introduced evidence that suggested the defendant would be more likely to commit violent acts in the future because he was black.
