The headline is just that - something to grab attention. As far as I can tell, it's not the same as what the article said.
Abdulaziz said he had gotten up in the night to get a glass of water and claims the teenager pulled him on top of her and placed his hand between her legs. He added it was possible he had semen on his hands after the sexual activity with her friend
Surely there would have been more medical evidence than we're being made aware of. If you have a medical exam, can't they tell if you've recently had intercourse or not (and not determined by presence of semen). Then there's the volume of semen, which would have been massively different if he had actually raped her with full intercourse taking place, to the tiny trace there would have been if his story was true.
I suspect the medical evidence (no sign of intercourse taking place, trace amount of semen only) would have had to back up his claim to make it credible.