I wouldn’t blame the jurors. Quite often, the prosecutors have managed to get a judge to suppress evidence that might set free an accused, so the jury often never hears about evidence that might have led to reasonable doubt.
The US system of justice is very much weighted in favour of the prosecutors.
Now you’re implicating judges and prosecutors in a conspiracy to put innocent people in prison. I’m not saying this never happens, but in this particular case that is just wild speculation unless you have some information that doesn’t appear in any of these media reports.