If she was raped, I feel very sorry for her. However, the more that comes out the more she looks like she's lying.
I don't think she cares whose life she ruins, she sees dollar signs.
If this is a shakedown, makes me wonder how many times this was done. The routine is pretty standard with regards to the investigation.
If she came with bruises from some other attack, those can easily be used with consentual sex to build a case of "rape".
Even with a proper investigation path, it comes down to was the sex consentual?
If she came to the event with bruises and that police/rape investigation indicates those bruises as having been aquired at the party the she is done. It also becomes an issue as to the natural progression of the bruises.