The district court committed no reversible error in holding that the injury was neither foreseeable nor caused by the defendants. Furthermore, on the record before us, the defendants, sued only in their official capacity, cannot be held liable because the evidence fails to establish a policy that was the moving force behind the constitutional violation. See Rivera v. Houston Indep. Sch.. Dist., 349 F.3d 244 (5th Cir. 2003). The district court’s judg *993 ment dismissing the complaint is therefore AFFIRMED.