I wonder if there is something somewhat related. It's not just A Phone, once they have the access method then virtually all other phones of that kind are open.

They are using a High profile case because it's easy to find an echo in their petition. They probably want to see many other phones, but this case goes deep in the mind of the people. From the start it seemed off to me that the suspect was cautious to destroy all the other information but leave the phone... there.

The phone might be just a normal one and have no clue at all.