"Everyone involved, save the dead man, is playing for the same team."

I believe within any organization there exists a natural form of bias, as those within them  generally holds the same goals and beliefs.  Its what makes organizations successful, whether they be your local Walmart, Girl Scouts of American, or your local city government. And specifically to government, this is why we have a jury system, so that some mechanism can exist to hold itself accountable for such bias.  And with that I might rephrase the question to this:

Are juries rigged to allow government to produce a specific outcome that only they can control?   While Jury tampering is taken very seriously, I acknowledge like any crime, it can occur, but to the extent that it is litterlly a fundamental aspect of juries, I do not believe to be true.   And just like any crime, I would have to see more than just opinion or anecdotal evidence to believe in such a conspiracy.