C. F. Keil and Franz Delitzsch on Deuteronomy 22:25-27

Deu 22:25-27

If, on the other hand, a man met a betrothed girl in the field, and laid hold of her and lay with her, the man alone was to die, and nothing was to be done to the girl. “There is in the damsel no death-sin (i.e., no sin to be punished with death); but as when a man riseth against his neighbour and slayeth him, even so is this matter.” In the open field the girl had called for help, but no one had helped her. It was therefore a forcible rape.