Require a reasonable suspicion of criminal activity before any Government agency engages in surveillance of private citizens.

Nine men between 24 and 38-years-old were arrested on suspicion of sexual activity with a child.

Three other men detained were taken for questioning on suspicion of terrorist activity.

The court concluded that the agents' actions were permissible in investigating suspicion of criminal activity.

But investigators have been hampered by German laws that prevent authorities from making arrests without serious suspicion of illegal activity.

New York City residents have questioned whether these stops are based on reasonable suspicion of criminal activity.

He does not claim suspicion of illegal activity.

The court said that before asking a driver's permission to search, an officer must have "reasonable and articulable suspicion" of criminal activity.

I have to say there has to be a reasonable suspicion of tax evasion or perhaps other criminal activity.

Its officers operate under emergency powers that allow them to stop, question, search, detain and interrogate people on suspicion of criminal activity.