From what I read, upon demand he gave the code to the Investigator, whomst had to watch the phone start to load and then erase it self. What a joy it must have been to watch them gifauh at that

The authorities conducting the illegal search entered the code, so the phone owner could assert that he gave them the right password and they were the ones that screwed it up. It's a bit late for that argument, but someone could use that in the future and there'd be no way to prove it wrong.