I expect the son of the queen of England sleeping with a girl procured by his friend who was also a convicted sex offender who also sexually abused those girls would have made the news. No matter what age the girl was.
Not entirely sure her exact age or the fact that some places let underage drinkers in is the worrying thing here...
I pretty much agree with all of that but would ask the question did he know that the girl had been procured? Did he know that the girl had been sexually abused? Or did he think that the girl was a bit like a pop group groupie, actively wanting to be there?
That said, what a massive error of judgement staying friends with someone convicted of 'sex crimes.' Bearing in mind the negative publicity around that plea deal down in Florida, it could even be a hugely arrogant dismissive attitude to society, thinking he was above the law, assuming he knew exactly how the girls were procured.