Engel v. Wendl, 921 F.2d 148, 150 (8th Cir. 1990) (“The right of inmates not to be punished unless officials have evidence establishing a violation is akin to the right not to be punished for committing a lawful act, which this court has found to be a clearly established and specific due process right.”).
Coffman v. Trickey, 884 F.2d 1057, 1063 (8th Cir. 1989) (“The contours of the right not to be punished for committing a lawful act have been sufficiently established so that Trickey, in charge of a thousand-man high-medium prison, should have known that she was proscribed from punishing Coffman unless his conduct constituted an offense.”).