Police asks Google for location data of all near crime scene
fastcompany.com
fastcompany.com
In fact, the article cited in this article was the one posted previously. It's much more thorough about what happened.
if not for a run of the mill murder it will be done for a terrorist attack, a child kidnapping or something similar. Judges will twist and bend the 4th Amendment and once it's done for that case, it's fair game for all.