re: #70 Dr Lizardo

He wasn’t tried for war crimes because the US wanted the data from the experiments.

Instead of being tried for war crimes, the researchers involved in Unit 731 were given immunity in exchange for their data on human experimentation.[8] Some were arrested by Soviet forces and tried at the Khabarovsk War Crime Trials in 1949. Americans did not try the researchers so that the information and experience gained in bio-weapons could be co-opted into the U.S. biological warfare program.[9]

I can’t find the paper I wrote on it in high school, but there’s the Wikipedia summary.