not sure if it is the "latest" position but the position used to be that jury duty is ok itself but if the case involved capital punishment and the jury would be expected to impose a sentence that possibly included death, that would be something that a Christian would have to make a "matter of conscience" (aka Society: "we'd really like to say don't do it but won't go so far, you get what we mean").
Interestingly, when the Alternative Military Service info came out mid-90s that emphasized doing our civic duty, I pointed out at the WT Study that the info applied to Jury Duty as the form of "compulsory civil service" that exists in the U.S. That went over like a lead balloon.
Anyway, just wondering, many areas have the "call in" system which allows you to keep working at your regular job. Also, you might not be able to get out of the 10 days or whatever is mandatory but avoiding getting seated on a jury is extremely easy. A person has to be a complete moron not to be able to get out of actually being seated during the Voir Dire process. All you have to do is make some sort of comments about your beliefs or position on the issues of the case that lean strongly one way or the other and you will get dismissed.