In my case the guy was (as best I could conclude) legitimately guilty of one of the lesser included charges, but there was some dodgy testimony, and I was the only one, in my group, to question it, and suggest that it might have some bearing on which of the many charges that might actually make him guilty of. It took quite some convincing to get anyone else to drop to anything lower than the top charge.
While I realize that this sample size of 1 is statistically insignificant, it really seems like if you wind up in court on criminal charges, odds seem to be you're screwed. "Innocent until proven guilty" felt, to me, like a pipedream.
As a jury we ended up deciding that the defendant was Not Guilty because without that filed paperwork, it was just two people's recollection of the events and we didn't feel the officer was more trustworthy.
I wouldn't have thought much about it after the fact, except that the prosecution was visibly upset at the decision which made me realize that that was likely not what normally would have happened.
I'm cynical enough about lawyers (having seen a few in action) that I wonder if "visibly upset" wasn't trying to manipulate someone - either the judge, or the jury members in case they serve on a jury again some day.
There's a reason that DUI defendants almost universally request jury trials.
It’s a huge problem.