What is probable cause and how does it effect what police officers can and cannot do

"Probable cause" generally refers to the requirement in criminal law that police have adequate reason to arrest someone, conduct a search, or seize property relating to an alleged crime. This requirement comes from the Fourth Amendment of the U.S. Constitution

Explanation:

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first paragraph (and busy all the night ,with a silence deep and white )

they thoght they were going to nuke each other