Gene Maddaus Senior Media Writer A judge has denied Bill Cosby’s motion for a new trial in the case of Judy Huth, who accused him of sexually assaulting her at the Playboy Mansion when she was 16 years old. In a ruling issued Tuesday evening, Judge Craig D. Karlan rejected Cosby’s arguments that the trial had been unfair and that Huth had not proved her case. Cosby’s spokesman said that he will appeal. A jury found Cosby liable in June for assaulting Huth and ordered him to pay $500,000 to compensate for her psychological harm. Huth testified that Cosby brought her and a friend to the Playboy Mansion in 1975, a few days after meeting them at a public park. She told the jury that Cosby got her alone in a bedroom, tried to put his hand down her pants, and then pulled down his sweatpants and forced her to masturbate him.