(a) A prosecution for murder may be commenced at any time.

(b) Prosecution for other crimes punishable by death or life imprisonment must be commenced within seven years after the commission of the crime; provided, however, that prosecution for the crime of forcible rape must be commenced within 15 years after the commission of the crime.

(c) Prosecution for felonies other than those specified in subsections (a) and (b) of this Code section must be commenced within four years after the commission of the crime, provided that prosecution for felonies committed against victims who are at the time of the commission of the offense under the age of 14 years must be commenced within seven years after the commission of the crime.

(d) Prosecution for misdemeanors must be commenced within two years after the commission of the crime.