I'm mixed... if they really thought there was evidence on the phone, they should have seized the phone and acquired a warrant IMO to compel the valid, non-destructive PIN be given over.

As I mentioned earlier, this is part of why my own plans for international travel are to only go with a notebook/sheet with contact numbers and buy throwaway devices on the other side. I don't think I'd travel internationally with a phone or laptop at this point, and that's kind of been my thoughts for a while. Especially given the direction that many countries, not just the US have taken. For that matter, I don't think I'd ever even risk travelling to the UK or China at this point. Not that I like the surveillance state here in the US, at least I still have some rights preserved.