Prior to 1974, a rape conviction was not able to be obtained on the uncorroborated testimony of the victim. In order to corroborate a testimony, the victim would have to be able to produce an eye witness or some other type of physical evidence. Prior to 1974, there was no such thing as DNA evidence. The ability to obtain a conviction on rape would be almost impossible. There is rarely an eyewitness to testify on behalf of a rape victim.
In fact, in 1967, rape was a misdemeanor offense. Rape in the present day is considered a felony offense. Attitudes have changed dramatically concerning sexual offenses. It seems incomprehensible in the present day that a rape conviction would require an eye witness or other physical evidence in order to get a conviction. However, even in 1967, some prosecutors were aware that the legislature needed to create changes in the laws to make them equitable to societal attitudes of the time. In fact, in one rape case the defendant was charged with assault in the second degree with the intent to rape and assault in the third degree. The defendant testified that he had completed the rape. The reason that he chose to testify to the completed rape was because a completed rape required eye witness testimony or other corroborating evidence. The offense of attempted rape or assault with the intent to rape, did not require the addition of corroborating evidence.
The defendant appealed the conviction because he contended that the prosecution was attempting to circumvent the requirement of corroborating evidence in rape cases by charging a crime that does not require corroboration. The court reviewed the case and determined that the fact that a prosecutor could conceivably circumvent the requirement of corroboration by charging a lesser included offense would result in a sentence that is greater for the lesser offense than it was for the completion of the rape.
New York Criminal Lawyer Blog

