Actually, if the offenses meet certain qualifications, the statute of limitations can be extended indefinitely under Penal Code section 803(g):
(g)(1) Notwithstanding any other limitation of time described in this chapter, a criminal complaint may be filed within one year of the date of a report to a California law enforcement agency by a person of any age alleging that he or she, while under the age of 18 years, was the victim of a crime described in Section 261, 286, 288, 288a, 288.5, 289, or 289.5.
(2) This subdivision applies only if all of the following occur:
(A) The limitation period specified in Section 800, 801, or 801.1, whichever is later, has expired.
(B) The crime involved substantial sexual conduct, as described in subdivision (b) of Section 1203.066, excluding masturbation that is not mutual.
(C) There is independent evidence that corroborates the victim's allegation. If the victim was 21 years of age or older at the time of the report, the independent evidence shall clearly and convincingly corroborate the victim's allegation.
The normal statute of limitations is 8 years. If that 8 years had not run by 1993 when section 803(g) was passed (Stogner case), then he can still be prosecuted so long as there is corroboration and "substantial sexual conduct," which pretty means more than just a touch.