Three others were charged separately and plea deals are in the works, according to prosecutors.

Eric Fleming, 54, pleaded guilty on Aug. 8 to one count of conspiracy to distribute ketamine and one count of distribution of ketamine resulting in death, according to prosecutors. Per the indictment, he admitted to obtaining ketamine from Sangha and distributing it to Perry by way of the actor’s assistant, Kenneth Iwamasa.

Fleming is facing up to 25 years in prison, according to the U.S. Attorney’s Office.

On Aug. 7, Iwamasa pleaded guilty to one count of conspiring to distribute ketamine causing death. Per the superseding indictment, the 59-year-old admitted to repeatedly injecting Perry with ketamine—including multiple injections the day he died—without medical training. He’s facing up to 15 years in prison.

Meanwhile, Dr. Mark Chavez, 54, who used to run a ketamine clinic in San Diego, Calif., is due to be arraigned Aug. 30 pursuant to an agreement to plead guilty to one count of conspiracy to distribute ketamine, according to prosecutors.

Per the indictment, he admitted to selling ketamine diverted from his own clinic—as well as obtaining additional ketamine under false pretenses from a wholesale distributor—to transfer to Plasencia.

Chavez is facing up to 10 years in federal prison.

E! News reached out to attorneys for Sangha, Iwamasa, Plasencia, Chavez and Fleming for comment but has not yet heard back.