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James Paul Grigson Jr. (January 30, 1932 – June 3, 2004), [3] nicknamed "Dr. Death" by some press accounts, [4] [5] [6] was a Texas forensic psychiatrist who testified in 167 capital trials, nearly all of which resulted in death sentences. [7]
In U.S. criminal law, a proffer agreement, proffer letter, proffer, or "Queen for a Day" letter is a written agreement between a prosecutor and a defendant or prospective witness that allows the defendant or witness to give the prosecutor information about an alleged crime, while limiting the prosecutor's ability to use that information against him or her.
An expert report is a study written by one or more authorities that states findings and offers opinions. In law, expert reports are generated by expert witnesses offering their opinions on points of controversy in a legal case and are typically sponsored by one side or the other in a litigation in order to support that party's claims.
Most notably in the context of a criminal prosecution, an expert witness who evaluates or examines an item pertinent to an investigation or case evaluation may add an entry to a "chain of custody" document, [6] a form that contains the item's description, the time and date of release for all prior custodians of the item, and the time and date ...
Attorneys must lay a foundation for witness testimony at trial. [26] The process differs when the witness is a lay witness or an expert witness. [26] However, as a baseline matter for both expert and lay witnesses, the testimony must be established to be helpful in assisting the trier of fact understand a fact at issue in the case. [27] [28]
General Electric Co. v. Joiner (1997), [1] which held that a district court judge may exclude expert testimony when there are gaps between the evidence relied on by an expert and that person's conclusion, and that an abuse-of-discretion standard of review is the proper standard for appellate courts to use in reviewing a trial court's decision ...
This template flags an article for the badly-needed attention of an expert or experts in the subject(s) specified (please use {{Expert needed talk}} on the talk page for non-urgent requests). The template assigns an article to specific subcategories of Category:Articles needing expert attention , depending on the topic of the article.
It provides that expert opinion based on a scientific technique is admissible only when the technique is generally accepted as reliable in the relevant scientific community. In Daubert v. Merrell Dow Pharmaceuticals , 509 U.S. 579 (1993), the U.S. Supreme Court held that the Federal Rules of Evidence superseded Frye as the standard for ...