Why not? The presumption for US citizens is supposed to be innocent until proven guilty. There's literally no evidence presented to support the CBP. There's no rules defined publicly, so it's literally secret police type rules that they can make up on the spot from public perception.

Edit: I'm aware of the fact that this isn't a US citizen, however there's no standards to define what the rules are and absolutely zero ability for accountability to the people that they are supposed to be protecting.