An appeals court says a San Angelo man serving prison time for the sexual assault of a 15-year-old girl is not entitled to a new trial. 27-year-old Tommy Eldon Robertson junior and his father, 49-year Tommy Robertson were tried jointly last year. Both were charged with having sexual relations with the same 15-year-old San Angelo girl...And both were sentenced to 20 years in prison. Tommy Robertson junior appealed his conviction, claiming that his attorneys should have objected to a joint trial. This week the Texas Third Court of Appeals upheld Robertsons conviction, and denied his request for a new trial.