[zerocrates]

The standard for getting a search warrant is probable cause, and that includes just probable cause to believe that there is evidence of a crime at the place to be searched.

Taking the witness analogy, even an actual person who's a mere witness can be compelled to testify with a subpoena.

[johnisgood]

No wonder people are not so willing to report a crime or be witnesses. They are getting punished for it.

[kayodelycaon]

A lot of places, talking to police is a very bad idea both because of the police and the other people in the neighborhood. You could very easily get shot for doing so.

[johnisgood]

In the US, absolutely. In Europe, not so much, thankfully.