His rights were already being violated. He was falsely arrested and denied his rights to an attorney.

They can prosecute him (and probably will) but he's got a pretty strong civil rights claim against the federal government for a false arrest and illegal search and seizure.

You can't arrest someone without a warrant or a reasonable suspicion of a crime. These thugs had neither when they arrested him, just that he's "a terrorist". That's why they were trying to get him to confess or commit a crime. That's why they didn't want a lawyer to get involved.