I'm surprised this case is still open.
And she took emergency birth control that night (or the next morning,) when she went to the hospital rape crisis center. There is virtually no chance those guys, even if they had raped her, would be the dad.
She obviously had sex with many guys on or around that date. And I feel for the one who will soon find out he's a new daddy, because it apparently could have been one of about 8 guys, according to the DEBRIS and SAMPLES taken from her VAGINA and UNDERPANTS.
And as DCLARY said : none of the 8 guys were the DUKE team.