 Victims were usually offered cocaine or what they believed to be cocaine during the sexual encounter. Fentanyl was often present in the drugs offered and at least four victims died due to a drug overdose. The seven people involved in the alleged prostitution ring would use dating websites to meet victims. Officials say they're aware of more than 50 incidents from New Hampshire to Virginia. For NPR News, I'm Tom Reese in Wilkes-Barre.