“But, Adams further claimed, he had forgotten the password he had just set, and thus was unable to provide the FBI with a password that would unlock the phone.”
You know, the same thing happens to me every time the FBI takes my phones.
But it's a smarter lie than Trump usually tells. Giving up your passcode is self incriminating, but a court can still compel you to do it. If you claim to have forgotten it, the court can't compel you to remember.
A Trumpian lie would be like "I never had a phone, and people said it was the best phone, better than Nokeeya, better than Obamaphone, nobody had ever seen a phone like it, people would come up to me and say, I've never seen a better phone. A perfect phone, they'd tell me, I don't know. The password, I shouldn't even tell you this, but it's so good, it's the name of a hooker I used to know in Atlantic City. She was, well, she was young and looked a lot like my daughter Ivanka, very smart woman, super smart, and sexy, smart though. Ivanka was smart, not Brandy, but she was very good too. She said I had the biggest hands of anybody, any hands, she'd ever seen. Brandy, not Ivanka said that, although Ivanka also says I have big hands. But no, to answer the question, I never touched Brandy, never even met her, she's not really my type, if you know what I mean. She's not a very good person, at least that's what they tell me, because I don't know, I never met her, bad person, bad."
Its a mess, but largely, courts cannot compel you to give up your phone password, because of the 5th amendment. They can force you to unlock a phone secured with biometrics, as that isn't compelled speech.
Sort of, but also it hasn't gone to the SCOTUS yet. Plus:
There is a difference between communicating a passcode to police and physically providing an unlocked phone to police, the court said. Though these two acts "may be functionally equivalent in many respects, this functional equivalency is not dispositive under current Fifth Amendment jurisprudence," the court said. "We conclude that the act-of-production analytical framework makes sense only where law enforcement compels someone to perform an act to unlock an electronic device."
The Utah case was an officer demanding to know the passcode. A court in New York might decide that the defendant can be compelled to enter his password and hand over an unlocked phone.
But if he's forgotten the password, then the phone is simply locked until somebody hacks into it.