"an interrogation that basically ignored his fundamental rights"
The trouble with fundamental rights in the USA is that if you're not from the USA, you don't have them. There are a few parts of the constitution that have been successfully argued to apply to everyone in the country (hence places like Guantanamo, which aren't in the country), but most of the protections only apply to US citizens. So while such treatment may breach what you think his rights should be or the rights an American would have in the same situation, it's entirely possible that it was all entirely legal and will easily hold up in court. It's not a sloppy investigation, they just know exactly what they're able to get away with while obeying the letter of the law.
Biting the hand that feeds IT
