What is the term for a document that outlines the legal theories, statutes, and cases for a motion?

The term "Brief" refers to a written document that presents legal arguments, relevant statutes, and case law in support of a motion. It serves to explain to the court the legal basis for the party's request, allowing judges to understand the facts and legal principles involved. A brief is typically submitted in civil and criminal cases to accompany a motion or appeal, outlining the key points of law and supporting evidence that justify the requested legal relief.

In contrast, a petition is formally used to initiate legal proceedings or request a court order, rather than to support a motion specifically. An affidavit is a sworn statement of facts, which can support various legal documents but does not encompass the broader legal analysis found in a brief. Lastly, a motion worksheet is typically an organizational tool used by attorneys to outline their arguments and supporting evidence before drafting a brief, but it does not constitute the formalized argument or the legal analysis required for court purposes. Thus, the correct term that encompasses the comprehensive aspect of legal theories, statutes, and case law in support of a motion is indeed a brief.