Missouri Constitution
Article I - Bill of Rights
Section 30 Treason—attainder—corruption of blood and forfeitures—estate of suicides—death by casualty.

That treason against the state can consist only in levying war against it, or in adhering to its enemies, giving them aid and comfort; that no person can be convicted of treason, unless on the testimony of two witnesses to the same overt act, or on his confession in open court; that no person can be attainted of treason or felony by the general assembly; that no conviction can work corruption of blood or forfeiture of estate; that the estates of such persons as may destroy their own lives shall descend or vest as in cases of natural death; and when any person shall be killed by casualty, there shall be no forfeiture by reason thereof.

Source: Const. of 1875, Art. I, Sec. 13.