Does the favorable termination rule apply to a civil rights claim?

state tribunal authorized to make such determination, or called into question by a federal court's issuance of a writ of habeas corpus." Heck, 512 U. S. at 486-87. A civil rights claim challenging the legality of a conviction or the length of confinement that has not been so invalidated is not cognizable under 42 U.S.C. 1983. Id. at 487; Balisok, 520 U.S. at 643. "[T]he applicability of the favorable termination rule turns solely on whether a successful 1983 action would necessarily render invalid a conviction, sentence, or administrative sanction that affected the length of the prisoner's confinement." Ramirez v. Galaza, 334 F.3d 850, 856 (9th Cir. 2003).