The brother of Casper Dr. Shakeel Kahn, charged in a multi-state prescription drug conspiracy, has been arrested in Arizona, according to federal court records.

Nabeel Aziz "Sonny" Khan (last name sometimes spelled Kahn) conspired with Shakeel Kahn and his wife, Lyn Kahn, and others to distribute oxycodone, according to a criminal complaint written by a U.S. Drug Enforcement Administration agent and filed with the U.S. District Court in Arizona on April 14.

He was arrested April 18, and heard the single charge during his initial appearance in federal court in Arizona on Monday.

His arrest marks the latest development in a prescription drug conspiracy in at least five states and the distribution of tens of thousands of mostly narcotic pills.

Shakeel Kahn and Lyn Kahn  were arrested in Casper on Nov. 30. They and former Wyoming resident Paul Beland were charged in a 21-count indictment handed up by a federal grand jury in January

They are charged with conspiracy to distribute oxycodone and alprazolam; dispensing of oxycodone; possession with intent to distribute oxycodone and aid and abet; unlawful use of a communication facility; dispensing of oxycodone and aid and abet; and engaging in monetary transactions derived from criminal activity. If convicted on all counts, they face up to scores of years of imprisonment.

The indictment also charged Kahn with one count of running a continuing criminal enterprise. If convicted on that count alone, he faces a minimum 20-year prison term.

These three defendants have pleaded not guilty. Shakeel Kahn and Beland remain in custody. A trial date has been set for Oct. 2, but that may be delayed because of a recent and somewhat unusual motion filed with the Denver-based 10th U.S. Circuit Court of Appeals.

Nabeel Kahn lived near Shakeel Kahn's residence in Fort Mohave, Ariz.

Many of the details of the case are not known at this time because the Wyoming U.S. Attorney's office asked federal court to seal the case. U.S. Magistrate Judge Kelly Rankin ordered the case sealed on April 14 until after Khan's initial appearance and after prosecutors ask to unseal it.

Assistant U.S. Attorney Stephanie Sprecher wrote, "The investigation is ongoing and information contained in the affidavit is also relevant to criminal activity of other individuals not named in this complaint. Therefore, disclosing the information contained in the affidavit supporting complaint to the above-named Defendant or any member of the public would seriously jeopardize the integrity of the ongoing investigation."