1949: Radzinowicz & Turner eds.: "hetero-sexuality"

Those "who fail to reach sexual maturity (hetero-sexuality), and who remain at a narcissistic or homosexual stage" are the products "of heredity, of glandular dysfunction, [or] of environmental circumstances." Henderson, Psychopathic Constitution and Criminal Behaviour, in Mental Abnormality and Crime 105, 114 (Radzinowicz & Turner ed. 1949).

Source
FindLaw: BOUTILIER v. IMMIGRATION SERVICE
http://laws.findlaw.com/us/387/118.html
http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=US&vol=387&invol=118