[X] My Assistant

[Nikoli]

Well, given that the point of a Trial by Jury is to mostly deliver Justice not Law. Someone highly trained could remain impartial, you make their pay, benefits, etc. completely separate from the judge or state's machinations. Of course that would be silly and nigh imposible.

Here's another possibility. Publically, the Juror system is staffed by volunteers who undergo minor cybernetic augmentation (a modified data lock equipped jack with the persona-fix loaded up) and they each have their own powerful jamming device (to keep extraneous radio signals out and tampering with the programming) while watching from behind a warded jury box.
In reality these are convicted felons, sentenced to a life of public service, they are little better than drones. They are persona-fixed near automatons who receive no pay and are kept in a constant state of sequestering. To maintain a "fair" trial, both councils and the judge for the trial have independent experts certify the chips are untampered and then each juror is loaded with the skillset pertinent to the case, rendering each one a relative expert in the fields necessary for the duration of the trial. The Defense cannot say it's unfair because they have their own experts going over the chip.
Could make an interesting run to extract such a Juror and de-program them, or replace one with your own juror.
That is of course assuming they still hold a trial by jury in any government in 2070.

[Gyro the Greek S...]

I think Witnesses could be excellent if for little else than witnessing contracts and the like. Excellent setup for a run, too-all the copies of the contract have been destroyed and the team needs to either extract or neutralize the Witness that still retains the information.