462 U.S. 696 (1983)
United States v. Place marked a pivotal moment in Fourth Amendment jurisprudence, particularly concerning the limits on law enforcement's ability to seize and detain personal effects during investigations.
Does the temporary seizure of a person's luggage, without a warrant and based on reasonable suspicion, for the purposes of conducting a drug detection scan violate the Fourth Amendment's protection against unreasonable seizures?
Under the Fourth Amendment, the seizure of personal property must be reasonable. A seizure unsupported by a warrant is presumed invalid unless it falls under a recognized exception, such as the presence of probable cause or exigent circumstances. The length and manner of the seizure are crucial in determining its reasonableness.
The Supreme Court held that while temporary detentions of personal effects on less than probable cause may sometimes be justified based on reasonable suspicion, the 90-minute detention of Place's luggage was unreasonable and therefore constituted a violation of the Fourth Amendment.
United States v. Place is significant for law students as it elaborates on the concept of 'Terry stops' applied to personal property, establishing that the principles governing the brief detention of individuals suspected of criminal activity apply similarly to personal effects. It emphasizes the importance of the duration of the seizure and its necessity relative to the circumstances, reinforcing the minimal intrusion rule under the Fourth Amendment.