. . . Id say 67.5% convinced of his innocence, . .
That's interesting that you use a percentage. I think of it that way also.
Many people do not understand what "Beyond a Reasonable Doubt" means. Some people think it means 100% certainty. It doesn't. Courts leave it deliberately vague, and do not say what percentage of certainty constitutes "beyond a reasonable doubt" or said another way, what percentage of doubt a person has is "reasonable." One person might think it means 75%, while another think it means 90%.
https://en.wikipedia.org/wiki/Reasonable_doubt People seem to change their idea of "reasonable doubt" depending on the severity of the crime or punishment. If the defendant can be sent to death row, a lot of jurors will think there needs to be more certainty. This is why sometimes you have bifurcated trials where one jury decides only guilty/not-guilty (and are not given hints at punishment levels) and another jury decides punishment.
In civil trials (for money damages), the standard of proof is "preponderance of the evidence." This means "more likely than not" which essentially means 51% proof of someone's liability.