CHARLOTTESVILLE — A federal court jury decided Friday that a Rolling Stone journalist defamed a former University of Virginia associate dean in a 2014 magazine article about sexual assault on campus that included a debunked account of a fraternity gang rape. The 10 member jury concluded that the Rolling Stone reporter, Sabrina Rubin Erdely, was responsible for defamation, with actual malice, in the case brought by Nicole Eramo, a U-Va. administrator who oversaw sexual violence cases at the time of the article’s publication. The jury also found the magazine and its publisher responsible for defaming Eramo. The $7.5 million lawsuit...