And why do they need to unlock your phone if they already proved you did the crime?

It means that if all the other evidence shows that the desired evidence is on the computer, then it is not a question of whether it exists, so youre not really searching for something. Youre retrieving it. That doesn't implicate the 4th amendment.

You're delusional. When ICE starts executing people on the spot for not giving up iPhone passwords, I'll eat my words.