Conn. Gen. Stat. § 53-200
Any person who is principal or second in any prize fight in this state shall be guilty of a class D felony. A contest in which blows are struck which are intended or calculated to stun, disable or knock out either of the contestants, or in which either contestant is counted out or otherwise declared defeated because of failure to resume the contest within a certain time, shall be deemed a prize fight within the meaning of this section. The provisions of this section shall not apply to (1) professional boxing or mixed martial arts matches held or conducted under the laws of this state, or (2) amateur boxing or mixed martial arts matches held under the provisions of section 29-143j, or under the supervision of any school, college or university having an academic course of study or of the recognized athletic association connected with such school, college or university.
Conn. Gen. Stat. § 53-200
(1949 Rev., S. 8516; February, 1965, P.A. 617, S. 11; 1967, P.A. 787, S. 3; 1972, P.A. 55, S. 12; P.A. 85-293, S. 9; P.A. 96-259, S. 13; P.A. 13-258, S. 113; 13-259, S. 16.)
See chapter 532a re boxing and mixed martial arts.