Missouri constitution
Article I: bill of rights
Section 8

That no law shall be passed impairing the freedom of speech, no matter
by what means communicated: that every person shall be free to say, write or publish,
or otherwise communicate whatever he will on any subject, being responsible for all
abuses of that liberty; and that in all suits and prosecutions for libel or slander the truth
thereof may be given in evidence; and in suits and prosecutions for libel the jury, under
the direction of the court, shall determine the law and the facts.