Several good tips have been given already. I was called for jury duty, did not want to serve and in the review process stated some VERY strong opinions. Was quickly excused. The worst thing you can do is appear to be neutral and remain quiet.
Any indication you can give as to either the innocence or guilt of the parties involved and stick with it will probably cause you to be released. Best wishes.
This is a little off the point, but I thought I would throw it in. I believe it was Steven Wright who said:
"If you are ever accused of a crime in this country you feel confident in the fact that you will be tried by a jury consisting of people too stupid to get out of jury duty."