This killer managed to avoid punishment and was even awarded prestigious honors for his research into the minds of defective children.
he became an expert on the pathology of mental illness and, after the war, lectured and became an expert court witness in thousands of criminal cases:

a. charles cullen

b. wayne bleyle

c. efren saldivar

d. heinrich gross

Option: d. Heinrich Gross

Explanation:

Heinrich Gross was born in Vienna and became head of the Am Spiegelgrund clinic, killed more than 700 children. The reason for the killing of the children was the master race in the Nazi Reign under its Euthanasia program. As a psychiatrist he began to study the neurology of mentally handicap children which earned him awards, later became a lecturer and served in court for insanity cases.

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