Suffer Not Injustice is pure Oliver Cromwell Vimes however is closer to your detective character in Film Noir specifically Dirty Harry I think the L Space annotations point out how many detective movie cliches appear in Guards Guards The flickering glowing lettered sign the rain shooting the lock off a door and the Do you feel lucky speech as adapted for use with a dragon Also I agree with Vimes Family history of regicide makes it sound like it was a habit Lorenzo was only one king