R. Kelly is currently behind bars after failing to pay close to $200k in back child support.

In February, the disgraced R&B singer turned himself into authorities in Chicago and was charged on 10 counts of aggravated criminal sexual abuse involving four women, three of whom were minors at the time. Kelly has maintained his innocence and denied the allegations against him. The 52-year-old pleaded not guilty to the charges and told CBS “This Morning” co-host Gayle King all of his accusers are “lying” on him.

One person familiar with Kelly’s background is veteran attorney Ed Genson. The 77-year-old represented the Grammy Award winner in his 2008 trial for child pornography. Genson recently sat down with the Chicago Sun Times and shared his thoughts on whether or not he believed the singer was guilty.

“He was guilty as hell!” Genson admitted. As for why Kelly remained out of trouble for so long since then, Genson says it’s because he convinced Kelly to get medical treatment for his sexual urges. “I’ll tell you a secret: I had him go to a doctor to get shots, libido-killing shots. That’s why he didn’t get arrested for anything else,” he claims.

Gensen, who is battling terminal bile duct cancer, told the outlet he is able to rectify his decision to help Kelly beat his case because he also “kept him out of trouble for 10 years.” According to the Gensen, it was at his advisement that Kelly chose to change the lyrics to the hit “Ignition” as to not upset judges. “It was originally [about] a high school instructor in a class teaching people how to drive a car. I changed the words,” he revealed.

Kelly’s former attorney also explained why he feels it may have been better if the “I Believe I Can Fly” singer wasn’t acquitted in 2008. “If you win a case with somebody, they think they’re bulletproof,” Genson said. “You’re almost better off, sort of, losing. He thinks he can do whatever the hell he wants. He has done everything he can to hurt himself.”

If found guilty on his recent charges, Kelly faces up to 70 years in prison.