Investigators in Atlanta and Chicago have asked potential victims of R. Kelly following the airing of Lifetime’s explosive documentary that discussed years of allegations against the singer, writes The New York Times.

Kimberly M. Foxx, the Cook County, Illinois’ state’s attorney, has asked witnesses to “please come forward” if they have any information on the accusations presented in Surviving R. Kelly. “There’s nothing that can be done to investigate these allegations without the cooperation of both victims and witnesses. We cannot seek justice without you,” she said at a news conference.

Lifetime’s six-part docuseries aired over the course of three days beginning last Thursday, featured interviews with alleged victims of Kelly who claimed  they met the singer when they were teenagers and were abused and controlled by him. Producers of the documentary also sat down with journalists, celebrities and mental health professionals.

Fulton County, Georgia’s district attorney’s office started interviewing following the show’s airing, a lawyer for Timothy and Jonjelyn Savage, who claim the singer is keeping their daughter, Joycelyn Savage, away from them, told the Times on Monday.

Foxx called Surviving R. Kelly “deeply, deeply disturbing” and said two concerned families in Chicago have contacted her office about their relatives recently meeting the singer.

Kelly has denied all allegations against him and has threatened to sue Lifetime for airing the series. He reportedly also has plans to launch a website to discredit some of the alleged victims, per reports.

“All of the women targeted by the current media onslaught are legal adults of sound mind and body, with their own free will,” a representative for Kelly told the Times in 2018. “Law enforcement officials in Atlanta and Chicago previously have made ‘wellness’ visits to check on the women in question and have found nothing to cause alarm.”