Over the years, the law was expanded to use criminal conspiracies to implicate vicariously others not directly linked to the center of a criminal conspiracy. Most forms of rape are executed with force or threat of force. Rape can also be done through trick or deceit. This would include drugging a person into sexual submission. In either case, the major element to prove is the lack of consent.
Statutory rape occurs when a person has sexual intercourse with an underage minor.
It is irrelevant whether or not the minor consented since it is presumed that a minor does not possess the mental capacity to consent. The most crucial element to the prosecutor's burden of proof. The prosecutor must prove the defendant's guilt beyond a reasonable doubt and to a moral certainty. Ultimately the jury must be convinced of the defendant's guilt without material doubt. However the doubt must be reasonable, not created by a clever and skilled lawyer.