You are a man aren’t you?
over 99% of rapes are not reported because women are conditioned to think it is their fault and no one would believe them, esp if the rapist is someone with money/fame/power. Also, back then rape was something to be embarrassed about, the culture was that women were at fault and is still there for some on FR.
Also roofies and some others work quickly (within minutes) and are eliminated just as quickly. You may want to do some research.
A lot of these Cosby defenders aren’t putting themselves back in the ‘70s where one of the women said she thought rape was a strange man attacking a woman with a knife in a dark alley. She said there was no definition for what happened to her back then. Date rape? The word didn’t exist back then.