U.S. Court of Appeals for the D.C. Circuit rulings
The federal appeals court for Washington, D.C. In 1923, when it decided Frye v. United States, it was called the Court of Appeals of the District of Columbia. Plain-English summaries from Criminal Defense Resources™; general education, not legal advice.
1 ruling, newest first.
Frye v. United States
The court affirmed a second-degree murder conviction and upheld the exclusion of a defense expert who would have testified about the results of a "systolic blood pressure deception test" (an early forerunner of the polygraph) given to the defendant. The court said that expert testimony based on a scientific principle is admissible only if the principle is "sufficiently established to have gained general acceptance in the particular field in which it belongs," and this test had not.