GRADY COUNTY, Oklahoma - A federal prisoner and accused organized crime boss was found dead in his jail cell overnight.

Anthony Mollman was rushed to the hospital around 10 p.m. Thursday, where he was pronounced dead.

The Oklahoma State Bureau of Investigation is investigating, and at this point will only say that the death is suspicious, although other law enforcement says it believes Mollman was killed.

Mollman was in the Grady County jail awaiting sentencing after pleading guilty to conspiracy to possess and distribute methamphetamine, and maintaining a residence for dealing the drugs.

The guilty plea was part of a deal with the government.

News 9 first reported on Mollman and his involvement with the Rogue Motorcycle Club back a year ago. 

U.S. Marshals raided the club after a 12-year investigation into organized crime and a massive drug trafficking operation.

The federal indictment says "members of the Rogue OMG were active as drug traffickers and enforcers for Anthony Mollman, a large scale drug trafficker."

Now the OSBI is investigating Mollman's death while he was in federal custody.

Right now, the agency's director says they know very little, only that Mollman was found dead in his cell with visible cuts.

"At this point we don't know what the cause of death is," said OSBI Director Stan Florence.  "We are waiting for the medical examiner to determine that investigation."

Mollman's family says Mollman was in another fight just a couple weeks ago.   

Director Florence says there were three other people in Mollman's jail cell. The OSBI has interviewed all the jail staff and inmates in the pod where Mollman died.    

The OSBI says the results of the autopsy will help determine their next step.