You have options:
A. Plead guilty, and go to Azkaban.
B. Plead innocent and have a trial to argue to be free of all charges (but all your able witnesses are probably pissed off).
C. Plead clemency and get a limited sentence, like community service.
D. Plead insanity and make yourself at home at St. Mungo's mental ward.
E. RUN! Don't stop until you reach home!
F. Walk away...Get some Firewhiskey and pretend this never happened.
G. Turn into an Animagus and live out your days living off of rats and communicating through fireplaces.
H. Become a Death Eater.