Article 3, Section 10. Treason.
Treason against the state shall consist only in levying war against the same or in adhering to its enemies, giving them aid and comfort. No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open court.
SOURCES: 1817 art VI § 3; 1832 art VII § 3; 1869 art I § 26.