I think this is a little too much conspiracy-mongering. Three federal judges have been killed in office, none of them seemingly assassinated by the US. government. Federal judges also have good job protection—"federal judges have perhaps the best job security available in the United States", and only 15 have ever been impeached in all history (it would take a session of Congress). Judges are also socially well-respected, so it'd be hard to find social attacks on a judge.
What exactly were you going for with your comment? What sort of illicit pressure were you suggesting?
I can't speak for the U.S., but I do know of (as it's someone I know - not because it's been in the press, apart from the character assassination bit) one case in the UK where, behind closed doors, a senior QC opposed the machinations of a secret court... And then totally unrelatedly the press and prime minister come forwards to slander him, and his wife is found at home brain dead, apparently having tried to commit suicide.
Those aren't even the most dangerous jobs in the US. Garbage collectors and construction workers face a higher chance of maiming or death every day than soldiers or police officers.
What exactly were you going for with your comment? What sort of illicit pressure were you suggesting?