Food for thought: my attorney informed me that they can and sometime do put people in jail until they turn over a password. So in reality your passwords are only as safe as your willingness to spend time in jail over them. After spending 3 days and 2 nights in solitary confinement (in the SHU at the federal detention center) I can tell you that most people will crack in pretty short order. It boring beyond comprehension.
Why were you put in solitary confinement? It was previously speculated that they put you there in order to get you to give up your private keys, but if they found your trezor seed then that would probably not be the case.
I would also think that being forced to give up passwords/encryption private keys would be potentially forcing someone to give up their right to remain silent and provide potentially incriminating evidence against themselves.
The fundamental human rights enumerated in the US Constitution are "just words on paper" for the government to wipe its ass with.