Chloroform type for the first half and then a hypnotic drug for the second half when she wakes up from the sleeping agent. Rapist said the drug would make her forget (autoregrade amnesia) and some drugs do cause short term memory loss if immediately given which this was. https://en.wikipedia.org/wiki/Anterograde_amnesia#Causes
Base +22, GoldPilot +4, cheeseychaos +8, (sic) +13