Chapter 11 – War crimes and crimes against humanity
Section 5 - War crime
(1) A person who in connection with a war or other international or domestic armed conflict or occupation in violation of the Geneva conventions on the amelioration of the condition of the wounded and sick in armed forces in the field, the amelioration of the condition of wounded, sick and shipwrecked members of armed forces at sea, the treatment of prisoners of war or the protection of civilian persons in time of war (Treaties of Finland 8/1955, Geneva conventions) or the additional amendment protocols done in 1949 to the Geneva Conventions, on the protection of victims of international armed conflicts and the protection of victims of non-international armed conflicts (Treaties of Finland 82/1980, I and II protocols) or other rules and customs of international law on war, armed conflict of occupation,
(7) denies a prisoner of war or another protected person the rights to a fair and lawful trial or in another manner denies him or her legal guarantees,
Not affording judicial guarantees to the passing of sentences and the carrying out of executions - NIAC
Wilfully depriving a prisoner of war of the rights of fair and regular trial - IAC
Wilfully depriving a protected person of the rights of fair and regular trial - IAC
EDIT.