Wait, so there's a backdoor, but police doesn't own it? Then I'm pretty sure NSA either has it or has a way to make Apple tell them how to use it, and it is done is some "security letter" manner that doesn't need a warrant and permissions from any non-kangaroo court. This is how these things are done these days. In any case, this confirms the backdoor exists and Apple has official queue for police to use it. One can only guess who else can access it and with which procedure...