That happens all the time during normal, legal place investigations. What's wrong with that? The concept of an investigation almost necessarily requires there to be innocent people involved, to differentiate the guilty from the innocent.
Eh. There is a big difference between an investigation ( as one sees in most American cinema hence why this particular phrasing is likely chosen ) and a fishing expedition, where LEOs go through data they in likelihood should not ( and to make it more annoying -- are highly unlikely to delete once done ).
I am saying this as a person who got LEO request for JUAN no last name and no other identifiers. As you can imagine, some of us are not amused by such requests.
edit: Location is much, much more telling than basic name and address.
