We can only hope it's the right one

from here and here

Going dark is for dim bulbs. Investigators got along perfectly fine before smartphones were invented, so not being able to see inside of them now shouldn't be that big a deal. Sure, being able to get into the contents of the smartphone would make investigators' lives easier, but since when do we give up our individual privacy and security to make things easier for law enforcement? The serve part of protect and serve means they serve our interests, not the other way around.