All possible. We don't know what LE found in the car. Maybe condoms, but so what? Unless used, that's not a big deal, as it's not that uncommon to find.
"Date" rape is so common. Huge problem at colleges now, but also for those who are not coeds. Who ever reported him at Liberty chose not to press charges within the legal system. The proof is hard to get for these things, especially if the female was agreeable from the onset. Agrees to go with the guy. Leaves a lone with the guy. Refuses assistance, doesn't call for help, allows guy to be arm in arm with her. Difficult to prove when the "yes" turned to "No" and just say so doesn't cut it in a court of law , and it's a time consuming, humiliating experience to undergo. But there are those who make false accusations of this sort too, so some sort of balance and the presumption of innoncence needs to be upheld as well. But here the woman in the case has disappeared which puts a whole other spin on the situation. Still if she is not found or is found without evidence linking him beyond what LE has released, it could be an uphill fight for a conviction of charges. IT is possible that JM did not directly harm her, let alone kill her, given what we know so far. He could have just let her out because she wanted out, she could have gotten hurt then, or been picked up by someone else.