This is a really hard situation. I cannot imagine myself being in that kind of situation, because most of the time I am trying to do the right things. So, if someone accused me for a crime that I didn't commit, I probably didn't know how to respond or what attitude to adopt. In that way, It is probable that lots of hypothesis blew out my mind, like what about my future or how my life is going to change. But, I probably would spend my time trying to identify who was the person that made such accusation and trying to realize what was his primary reason to do that. Once I got over this primary response, I would try to find a good lawyer and start finding evidence to support my innocence.