Mo. Rev. Stat. § 557.045 (2026)

  557.045.  Ineligibility for probation, SIS, SES, or conditional release, certain offenses. — No person found guilty of, or pleading guilty to, the following offenses shall be eligible for probation, suspended imposition or execution of sentence, or conditional release, and shall be sentenced to a term of imprisonment pursuant to subdivision (1) of subsection 2 of section 557.011:

  (1)  Second degree murder when a person knowingly causes the death of another person or, with the purpose of causing serious physical injury to another person, causes the death of another person, as defined in subdivision (1) of subsection 1 of section 565.021;

  (2)  Any dangerous felony, as the term is defined in section 556.061, where the person has been previously found guilty of a class A or B felony or a dangerous felony;

  (3)  Any dangerous felony, as the term is defined in section 556.061, where the commission of the felony involves the use of a deadly weapon, as that term is defined in section 556.061; or

  (4)  Any dangerous felony, as the term is defined in section 556.061, where the victim is a law enforcement officer, firefighter, or an emergency service provider while in the performance of his or her duties.