Example and Hypothetical Scenario. A person commits false imprisonment when they engage in the act of restraint on another person which confines that person in a restricted area.A peace officer may make a valid arrest without a warrant in certain circumstances other than those set out in this instruction. The plaintiff's claim in a warrantless false arrest lawsuit arose from a sheriff s deputy s visit to her house to check on the welfare of her daughter. The main difference between the two is that false arrest requires an arrest, but, false imprisonment only requires unlawful detention. Defendant Marcel Daron King appeals his conviction for being a felon in possession of a firearm in violation of 18 USC § 922(g). The defendant filled out an incident report about the assault but did not assist in applying for the arrest warrant. McLaughlin, 500 U.S. 44,. The Fourth Amendment to the United States Constitution prohibits the federal government from conducting unreasonable searches and seizures. An officer must either have a warrant or reasonable suspicion that a person has committed or is about to commit a crime (probable cause).