Josef Mengele

Josef Mengele was a male Human in Nazi Germany, infamous for performing immoral medical experimentation on concentration camp prisoners.

Dr. Leonard McCoy was believed by the Romulans under Centurion Ruanek to be a war criminal, who earned the name "Bones" for his experiments on prisoners' bone marrow. McCoy reaction to hearing this was, "The name's McCoy, not Mengele!" 

Cardassian doctor Crell Moset was compared to Mengele for his experimentations on Bajorans during the Cardassian Occupation of Bajor. 


 * Star Trek: Deep Space Nine Companion notes the episode "" had originally been conceived as being about a Mengele-like Cardassian doctor during the Occupation. Such a character was later established in VOY episode "Nothing Human".