Earlier quoted context omitted.
> They can hold your stuff indefinitely, so be prepared to lose it if you go this route CBP do need reasonable suspicion to hold you belongings or do a forensic search of your computer (Cotterman 2013) - they can't just randomly take things on a whim. The longer they hold it, the higher standard required.
I strongly suspect that CBP's "strong suspicion" is equivalent to a HN poster's "whim." I'm not insulting either party, however when anything similar to this debate plays out, parties talk past each other on this sort of disagreement.
Reasonable suspicion is not required for every search at a border crossing, and the Federal circuit courts are split on whether it is required for a forensic examination of a mobile phone at a border crossing. The 9th circuit has jurisdiction in this case, and has ruled that it is required.