There has never been a section 1983 case accusing welfare officials of selling foster children into slavery; it does not follow that if such a case arose, the officials would be immune from damages liability because no previous case had found liability in those circumstances." K.H. Through Murphy v. Morgan, 914 F.2d 846, 851 (7th Cir. 1990). You shouldn't need a case to make the point that a hand under a shirt is not a pistol, shotgun, rifle, or other firearm.