Prison sentences for a Chicago man and his two sons after they pleaded guilty to luring underage girls in Muncie into becoming sex slaves. 45-year-old Nathan Nicholson has been sentenced to more than 16 years and his two 24-year-old sons, Tyrelle and Myrelle were sentenced to more than 17 years. Investigators said at least one of the girls involved were as young as 14 years old.