Ghislaine Maxwell’s sex-trafficking trial is scheduled to start in earnest in federal court in Manhattan on Monday with opening statements about the eagerly awaited case. The first arguments will set the stage for a six-week trial in which the British socialite’s alleged involvement in Jeffrey Epstein’s crimes will be aired in grueling detail, outlining how prosecutors and defense attorneys will approach the proceedings. Maxwell, 59, stands accused of recruiting and grooming girls for the late disgraced financier, from 1994 to 2004, some of whom were just 14 years old. Epstein’s sometime girlfriend is also accused of participating in his sexual...