Guantanamo Bay

My friend and I are in disagreement. He's racist and hate Obama*, while I'm liberal. My history teacher said there's a law, Habeas corpus I think, which states you cannot be detained by law enforcement people for more than 48 hours without evidence that you did something. ie, There's a school shooting, you're a wittness, they hold you for 36 hours to question you/see if you did it. While there's been people in Guantanamo Bay for around 7 years with no such evidence. My Friend says Bush passed some kind of law that lets him do that with terrorist. Iunno, Google showed nothing.
Anyone here know more about this?


*No, he's not racist. Just a joke. D;