Deuteronomy 22:22 states:
If a man is found lying with the wife of another man, both of them shall die, the man who lay with the woman, and the woman. So you shall purge the evil from Israel. (Deuteronomy 22:22, ESV)
The word used here for "lying with" is שֹׁכֵ֣ב (sokeb), a form of שָׁכַב (shakab), which is also used in Deuteronomy 22:25 (as וְשָׁכַ֣ב (washakab)), which is about rape.
But if in the open country a man meets a young woman who is betrothed, and the man seizes her and lies with her, then only the man who lay with her shall die. (Deuteronomy 22:25, ESV)
Seemingly, then, this word can also refer to rape. Does that mean, then, that Deuteronomy 22:22 implies that a married rape victim should be killed? I think that this question is relevant because there isn't anywhere else in the Torah that I know of that deals with the rape of a married woman.
I have heard people try to use Deuteronomy 22:25 as proof that the rapist of both a married and unmarried victim alike should be killed (and the woman not), but is this valid? Deuteronomy 22:25 refers to a betrothed woman. But, if it isn't valid, where can we find out what the punishment is for a man who rapes a married woman, and for a man who rapes an unmarried, unbetrothed, woman? And what should be done to her? I know some people will use Deuteronomy 22:28-29 in the case of the unbetrothed woman, but there is debate on whether this passage actually refers to rape or not.