You have to speak to a civil litigator about a case like this. If she did things without your permission or consent, you can attempt to press charges.
I am a criminal defense attorney practicing in Nassau, Suffolk and New York City. The above information is not a substitution for a meeting whereas all potential legal issues can be discussed.
The only criminal activity appears to be if you can prove she forged the checks. You can contact the local police and DA to pursue this. You can also pursue a civil suit, which would be more likely to be successful, to recover money loaned to her. The major issue would be proving that these were loans instead of gifts.