I remember reading many years ago about studies where they went back and asked jurors who were involved in cases where it turned out the person convicted was innocent about what they were thinking.

And it seemed pretty clear that juries aren't really operating at 12 independent people with critical reasoning skills. Overwhelmingly there are always a few people with real reservations who vote to convict anyway. Those people always justify it to themselves with various reasons. And the reasoning they uncovered were things like "if he is innocent this will get overturned on appeal" or "everyone else on this jury is convinced of the evidence they cant all be wrong" or lots of other internal justifications people use to live with themselves.