Dr. Leo Stanley

Dr. Leo Stanley served as a chief surgeon for nearly four decades. Between 1919 and 1922, Dr. Leo Stanley injected 656 prisoners at San Quentin Prison.  Stanley would take the testicles out of executed prisoners and surgically implant them into living prisoners. In other experiments, he attempted to implant the testicles of rams, goats, and boars  into living prisoners. Stanley also performed various eugenics experiments, and forced sterilization  

on San Quentin prisoners Stanley believed that his experiments would rejuvenate old men, control crime (which he believed had biological causes), and prevent the "unfit" from reproducing.

Source: ianshul | wikipedia