A federal jury this morning found Cook County Circuit Judge Jessica A. O’Brien guilty of two counts of fraud.O’Brien was accused of participating in a $1.4 million mortgage fraud scheme years before she took the bench.The jury in U.S. District Judge Thomas M. Durkin’s court deliberated about 4½ hours over two days before reaching its verdict.O’Brien clasped her hands on the counsel table and showed no emotion as Durkin polled the eight women and four men on the jury on their verdict.Defense …