76 people were imprisoned for refusing to pay the forced loan. In November 1627 five of the main forced loan resisters prompted Charles' imprisonment of them by claiming a writ (court order) of 'habeas corpus'. Under this ancient right, they had to be tried for an offence or else be released. Charles took them to trial in what is known as the Five Knights' case. A judgement upheld Charles' prerogative to imprison without trial those who refused to pay the forced loan.
However, that judgement was not a 'general' right for Charles to imprison without showing good reason; it applied only in 'particular' case. However, Charles allowed one of his leading legal officers, Attorney General Sir Robert Heath, to falsify the legal records in the Five Knights' judgement to state that the king had a 'general' right to imprison people without the need to show good reason. Any critic of the king, let alone opponent, would therefore be in very real danger of disappearing into the Tower of London without reason whenever Charles felt like it.