What is the statute of limitations for an action brought by John Venegas alleging that defendant officers conspired to deny him a fair trial?

On October 28, 1977, Venegas filed this action under 42 U.S.C. Sections 1983 and 1985(3) alleging that defendant officers conspired to deny him a fair trial by tampering with witnesses and knowingly presenting false evidence and perjured testimony to the criminal jury. The district court granted summary judgment to the defendants on the ground that the action was barred under the applicable statute of limitations. That judgment was reversed and remanded for trial in Venegas v. Wagner, 704 F.2d 1144 (9th Cir.1983).