you really have to go out of your way to figure out how to install graphene and on top of that you have duress code and its pretty much painting a red target on yourself across borders
the authorities dont care about your edward snowden insired views on privacy, they already suspect you and you wipe your device before inspection then they have no choice but to treat you with suspicion
i think that if you were a real hardcore criminal, like a cartel boss,you would not even carry graphene on you, everything would be done through intermediaries who have a chain of people to take the fall.
Well wiping isn't just cause for suspicion, it's actually destroying evidence. He was charged with that, but they couldn't charge him with domestic terrorism. He also had the option to decline unlocking the phone.