Aggravated sexual assault of a minor: Class A felony

(a) A person is guilty of aggravated sexual assault of a minor when such person commits a violation of subdivision (2) of subsection (a) of section 53-21 or section 53a-70, 53a-70a, 53a-71, 53a-86, 53a-87 or 53a-196a and the victim of such offense is under thirteen years of age, and (1) such person kidnapped or illegally restrained the victim, (2) such person stalked the victim, (3) such person used violence to commit such offense against the victim, (4) such person caused serious physical injury to or disfigurement of the victim, (5) there was more than one victim of such offense under thirteen years of age, (6) such person was not known to the victim, or (7) such person has previously been convicted of a violent sexual assault. (b) Aggravated sexual assault of a minor is a class A felony and any person found guilty under this section shall, for a first offense, be sentenced to a term of imprisonment, twenty-five years of which may not be suspended or reduced by the court and, for any subsequent offense, be sentenced to a term of imprisonment of fifty years which may not be suspended or reduced by the court.