Without probable cause, a police officer cannot search other persons who happen to be present at the scene of a search.

警察没有正当理由不能对碰巧出现在搜查现场的人进行搜查。

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A federal law - the Stored Communications Act - allows prosecutors to obtain certain electronic data without a search warrant or a demonstration of probable cause.

一项联邦法律——《存储信息通讯法案》允许检察官在未得到调查授权或未说明可能原因的前提下可以获取某些电子信息。

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Without any probable cause for search, this is a violation of the Fourth Amendment.

FORBES: Connect

Police were free to employ the tactic for any reason without showing probable cause to a magistrate and getting a search warrant, the government said.

WSJ: Supreme Court Reins In Police on GPS Trackers

This case and a separate and still pending appeal over police intrusions into homes and cars could have a far-reaching impact on when a person's private contents can be subjected to a search without clear probable cause or a valid warrant.

CNN: Supreme Court sides with dog in search case