Then it all gets into the hands of 12 Angry Men (or it's equivalent)
The jury I served on was APPALLING in it's wanting to base a verdict on experiences each of the members had; instead of the preponderance of evidence.
It was like pulling teeth to get rational thought from so many of them!
This was a murder trial, and it was a pretty easy decision to convict. The physical evidence matched up with the testimonies of the two people who were there when the murder happened. When it was time to deliberate, we just went back over what we had and made a decision. No arguments. The victim was shot to pieces and the defendant was the only one who could have done it. The jurors all seemed like reasonable people.