No, it was not a “fact” that the prosecution did not present a good case. It’s an opinion. An equally valid opinion is that the jury ignored the facts presented to them. I saw most of the trial, and it was a good case. Even good cases are wasted on stupid jurors, or on jurors that might be putting financial gain over fairly deciding a case.
The jurors were going to make a mint, guilty or not, so I don’t think that was as much a factor. But juries can be swayed by other factors, like a mother losing her daughter (Cindy losing Casey) or whether or not they like the participants. Maybe the prosecutor came off like a big jerk, not saying he did.
All these play a part in the decision of a jury.