1. A person commits the offense of sodomy in the first degree if he or she has deviate sexual intercourse with another person who is incapacitated, incapable of consent, or lacks the capacity to consent, or by the use of forcible compulsion. Forcible compulsion includes the use of a substance administered without a victim's knowledge or consent which renders the victim physically or mentally impaired so as to be incapable of making an informed consent to sexual intercourse.
2. The offense of sodomy in the first degree or an attempt to commit sodomy in the first degree is a felony for which the authorized term of imprisonment is life imprisonment or a term of years not less than five years, unless:
(1) The offense is an aggravated sexual offense, in which case the authorized term of imprisonment is life imprisonment or a term of years not less than ten years;
(2) The person is a persistent or predatory sexual offender as defined in section 566.125 and subjected to an extended term of imprisonment under said section;
(3) The victim is a child less than twelve years of age, in which case the required term of imprisonment is life imprisonment without eligibility for probation or parole until the offender has served not less than thirty years of such sentence or unless the offender has reached the age of seventy-five years and has served at least fifteen years of such sentence, unless such sodomy in the first degree is described under subdivision (4) of this subsection; or
(4) The victim is a child less than twelve years of age and such sodomy in the first degree or attempt to commit sodomy in the first degree was outrageously or wantonly vile, horrible or inhumane, in that it involved torture or depravity of mind, in which case the required term of imprisonment is life imprisonment without eligibility for probation, parole or conditional release.
3. Subsection 4 of section 558.019 shall not apply to the sentence of a person who has been found guilty of sodomy in the first degree or an attempt to commit sodomy in the first degree when the victim is less than twelve years of age, and "life imprisonment" shall mean imprisonment for the duration of a person's natural life for the purposes of this section.
4. No person found guilty of sodomy in the first degree or an attempt to commit sodomy in the first degree shall be granted a suspended imposition of sentence or suspended execution of sentence.