My gut feeling is that it is a GUILTY verdict, and here is one reason why, imo.
If all 12 of these people thought that Chase was being unfairly railroaded, and was an innocent man, I feel that they would put his release from jail as a priority. They would be outraged and they wouldn't allow it to be shelved for the next 3 days. JMO
But if they are voting GUILTY, then nothing really changes with 3 more days of incarceration. It is difficult for the family, but Chase is still locked up, and life goes on.