Mo. Rev. Stat. § 565.056: Assault in the fourth degree.

1. A person commits the offense of assault in the fourth degree if:

(1) The person attempts to cause or recklessly causes bodily harm to another person;

(2) With criminal negligence the person causes bodily harm to another person by means of a firearm;

(3) The person purposely places another person in apprehension of immediate bodily harm;

(4) The person recklessly engages in conduct which creates a substantial risk of death or great bodily harm to another person;

(5) The person knowingly causes or attempts to cause physical contact with a person with a disability, which a reasonable person, who does not have a disability, would consider offensive or provocative; or

(6) The person knowingly causes physical contact with another person knowing the other person will regard the contact as offensive or provocative.

2. Except as provided in subsection 3 of this section, assault in the fourth degree is a class A misdemeanor.

3. Violation of the provisions of subdivision (3) or (6) of subsection 1 of this section is a class C misdemeanor unless the victim is a special victim, as the term "special victim" is defined under section 565.002, in which case a violation of such provisions is a class A misdemeanor.