According to unconfirmed information, because there is not enough evidence, it is Pavlik Morozov, a 13 year old boy reported his father to the secret police in 1932. His father was sentenced to ten years in prison and later executed. His family did not just accept his treatment, so on September 3 that year, his uncle, grandfather, grandma and cousin, together with his younger brother, killed him.
The answer is: C. Pavlik Morozov