The document summarizes key Supreme Court cases related to searches, seizures, arrests, and use of force by law enforcement under the Fourth Amendment. It discusses the elements required for a constitutional seizure, search, or arrest. It also outlines what level of force is permitted in certain situations, such as establishing a roadblock, conducting a stop-and-frisk, or using deadly force against a fleeing suspect. The document analyzes several Supreme Court cases that address these issues, including Brower v. County of Inyo, Terry v. Ohio, Berkemer v. McCarty, and Tennessee v. Garner.