We know that the rapist was caught approximately one month after the horary was asked. Thus we need to see a unit of '1' or '30' somewhere in the chart.

I agree with others who use venus as ruler of the 11th house for the friend and ruler of the 7th house for the rapist.
For rape itself I would take Pluto. In mythology Hades (Pluto) rapes Persephone and takes her into the underworld.

Pluto is in her 4th house and she was raped in her home. Pluto is weakened because of being retrograd and makes an opposition to mercury in roughly one day. Mercury is in the 10th house of her friend (state authority).

That could have played a role here as well.