The drafters played on fears of "drug-crazed, sex-mad negroes" and made references to Negroes under the influence of drugs murdering whites, degenerate Mexicans smoking marijuana, and "Chinamen" seducing white women with drugs. Dr. Hamilton Wright, testified at a hearing for the Harrison Act. Wright alleged that drugs made blacks uncontrollable, gave them superhuman powers and caused them to rebel against white authority. Dr. Christopher Koch of the State Pharmacy Board of Pennsylvania testified that "Most of the attacks upon the white women of the South are the direct result of a cocaine-crazed Negro brain".