UPDATED with details from news conference, 1: 33 PM: Rumors about R. Kelly and underage girls have swirled since the 1990s, and today the singer is facing a 10-count grand jury indictment of aggravated criminal sexual assault involving minors in Illinois. Robert Kelly is in police custody, and Cook County State’s Attorney Kim Foxx said in a news conference today that the singer is expected to appear in count Saturday afternoon for a bond hearing. The indictment comes…