A Chicago man left the Cook County Jail Thursday night after a jury found him not guilty of murder charges he’d been detained on since 2011.While the verdict was undoubtedly a life-changer for the defendant, one of his attorneys, who works in intellectual property law, said the win is also a highlight in his career.Omar Williams, 27, was found not guilty of murder and attempted murder following a 3½-day trial in Cook County Circuit Court before Circuit Judge Kevin M. Sheehan.The charges date back to July 1 …