I disagree with Thomas. Even if the records were collected and “belong” to someone else, I do think it is important to have search warrant before accessing. There are so many collections of our data which we are not aware of that should be respected. Your car tracks you, the road toll pass, the bank ATM (which you used, the pic of you showing your attire and if anyone with you, etc.), your online activity (bet there are plenty of tracking records about which site you have visited, pages, and so forth, much beyond Google and despite any blocking programs you might install). We should be protected and respected in all.
This is one of those cases where I may not have liked the ramifications of the dissenting opinion but I believe that opinion is correct on the law.
You don’t maintain your medical records either, but...