Search without a warrant
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
No law enforcement officer shall conduct any search without a valid warrant except:
(a) Incident to making a lawful arrest; or
(b) With the voluntary consent of the person being searched; or
(c) When the search is of a moving vehicle and the officer has probable cause to believe that it contains contraband, stolen property, or property otherwise unlawfully possessed.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.