What would I have done?
Allegations of rape can, and should, only be dealt with by the courts. To take any other course of action other than reporting it to the police. Firstly prevents the alleged perpetrator from defending themselves in a court of law. But it also prevents the alleged perpetrator being taken off the streets if they are found guilty!
Look. It’s not rocket science!
Delaying the allegation, merely served to prevent this lady from establishing she had been drugged. However, some may infer conveniently. It also denied the ‘defendant’ from establishing her blood alcohol level.
As far as I can tell, there is no claim that either intercourse, or assault ever took place?
This looks like a very serious allegation with very little supporting evidence.
Absolutely perfect fodder for those of the #MeToo persuasion, who find the principle of “innocent until proven guilty” a little too problematic for their cause. So they prefer other, less stringent, means of ‘prosecuting’ their case!