There is no limitation on the time within which a prosecution for Class A, Class B, or Class C felony must be commenced. Source: SDC 1939 & Supp 1960, § 34.0701; SDCL, § 23-8-1; SL 1978, ch 178 , § 500; SL 1981, ch 186 , § 2; SL 2005, ch 120 , § 149.