What is the statute of limitation for conspiracy to receive and conceal Exhibit 3?

With respect to the conspiracy charge, the statute starts to run from the time of the last overt act committed in furtherance of the conspiracy. (People v. Zamora, 18 Cal.3d 538, 134 Cal.Rptr. 784, 557 P.2d 75.) We will assume for purposes of this decision that there were two separate conspiracies, one to receive and another to conceal Exhibit 3. As to the former, the last overt act in furtherance of the conspiracy was transfer of Exhibit 3 to Cheren in October 1972. Prosecution of this conspiracy is therefore barred by the statute of limitations. ⁸