Attorney Michael Avenatti has been working on a case against R. Kelly since April of last year.

A new VHS tape recording that reportedly shows R. Kelly engaging in sex acts with a 14-year-old has been obtained by prosecutors in Chicago.

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The tape was given to lawyer Michael Avenatti earlier this month from someone who knows the R&B singer and the alleged victim "extremely well," according to a report from CBS News. Avenatti then gave the tape to the Cook County state's attorney. The tape is believed to be from the 1990s.

"This is deviant conduct…R. Kelly deserves to spend the rest of his life in a penitentiary," Avenatti said. "There's 2 different scenes shot on two separate days on this tape…I was disgusted by what I viewed…This is a disgusting video."

Avenatti also issued two separate statements with one detailing how he came to build a case since Kelly and the other providing information on what was seen from the tape.

The attorney also accused the singer of rigging his 2008 trial which resulted in his acquittal.

"We have discovered substantial evidence that he and certain enablers engaged in systematic witness intimidation, evidence tampering, physical threats, and payments to witnesses," Avenatti tweeted.

The lawyer spoke further with Law and Crime on this topic, telling them:

"He, with certain of his handlers, threatened witnesses with physical violence and death, secreted witnesses by having them leave the area, tampered with and destroyed evidence, and bribed witnesses. This was all done as part of his effort to obstruct justice."

The tape Avenatti gave to Chicago prosecutors is different from the one from Kelly's 2008 trial.

Avenatti was asked by CBS if he thinks the "I Believe I Can Fly" singer will be arrested in the next few days, to which he responded: "I don't think it's going to take a significant amount of time for R. Kelly to be indicted and arrested in Chicago."

Source: CBS News