Thanks for the update. I'm pleased to have been of help to you so far.
Q) If they later find that I knew this person would that be grounds to say that I obstructed justice?
Yes, it's possible, but I doubt it based on what you've said. Choosing to say nothing to the police is a constitutionally protected right. Making untruthful statements to the police is not.
Lying to the police by claiming to NOT know this girl may border on obstruction, but I doubt it. It would be different if you made up a story that was completely untrue in an attempt to mislead the police.
For example, imagine that the police come to your house looking for me. You answer the door and tell the officer you haven't seen me for days. In fact, I'm hiding under the bed, you know I'm hiding under the bed, and you're covering for me. THAT'S obstruction.
Your statement about not knowing her is more akin to a "little white lie." But is it possible to get charged? Sure. Convicted? Probably not.
Q) I am not trying to get her in trouble so I don't wish to speak to the police again
Say nothing more to the police, no matter what they do or say. Even if they arrest you, do NOT make the mistake of thinking you can explain your way out of it or cooperate in exchange for them not prosecuting you. It generally does not work that way.
I would ONLY consider cooperation after retaining an attorney, discussing the facts, making an educated estimation of your chances at trial, and getting specific legal advice about the situation. If you do not know an attorney in your area, try the Maryland State Bar attorney referral service
. They can point you in the right direction.
In the future, in this type situation, NEVER talk to the police. Say nothing. Tell all your friends.
Thanks again for the opportunity to assist you. Please let me know if I can help further. If I've answered your questions, please rate my answer positively.