There's a fourth amendment case on the Supreme Court docket (Chatrie v. U.S.) about Google searching a massive amount of user data to find people in a location at a specific time, at police request. The case is about whether the police's warrant warranted such a wide scope of search (if general warrants are allowed).

Point being: Google will 100% give your info to the police, regardless of whether the police have the legal right to it or not, and regardless of whether you actually committed a crime or not.

Bonus points: the federal court that ruled on the case said that it likely violated the fourth amendment, but they allowed the police to admit the evidence anyway because of the "good faith" clause, which is a new one for me. Time to add it to the list of horribly abusable exceptions (qualified immunity, civil asset forfeiture, and eminent domain coming to mind).

They knowingly participated in PRISM, too.