Kris was appointed Deputy Minister of Education by Field Marshal Thanom Kittikachorn in his 1969 government.

On the evening of 14 October, the police and army began shooting at demonstrators, killing at least 70.

[1] Thanom and Praphas resigned from their political roles, but continued to lead the military.

His death has been called "...sudden and strange..."[2]: 4 Kris's role in the events was countered by Narong in a 2003 book.

[1] The army's Kris Sivara Camp in Sakon Nakhon Province is named after him.