When I was selected for jury duty, my Rav [who happened also to be my employer at the time] was adamant that I should not make any attempt to get out of it.
His position is that by allowing the post to be filled by someone else, I was potentially participating in the miscarriage of justice. [This is, of course, based on the premise that I would be an attentive, logical, fair and objective juror.]
He told me rather forcefully that it was my responsibility to answer all questions honestly and accurately, and, if selected (I was), to discharge the responsibilities of juror faithfully (I did).
This was quite some years ago, but if I remember correctly, he even told me that it would be my responsibility to find a defendant guilty of a capital offense, if the law would so dictate as per the evidence presented.
For the record, my Rav is a Talmid Chacham of the first caliber, an alumnus of some of the most respected Yeshivos, who has close personal relationships with many Gedolim.