Law enforcement agencies electronically monitored a Casper doctor's travels for three months before charging him with conspiracy to distribute oxycodone, according to court documents.

From Sept. 11 to Dec. 12, the Wyoming Division of Criminal Investigation tracked the whereabouts of a sport utility vehicle owned by Dr. Shakeel Kahn and his wife, Lyn, according to court records.

The case started in April when the Wyoming Board of Pharmacy suspected Kahn of prescribing large amounts of painkillers and asked the U.S. Drug Enforcement Administration to investigate. A similar investigation started in Arizona, where Kahn also held a DEA license to prescribe painkillers. Arizona's Board of Medicine suspending Kahn's medical license in August, and the Wyoming Board of Medicine did the same on Nov. 29.

Kahn would charge a flat fee of usually $500 in cash for a prescription.

His customers in at least four states would receive prescriptions for up to 720 oxycodone tablets of 30 milligrams each, or 20 times more than would be considered a high risk dose. (Oxycodone fetches about $1 per mg on the street depending on market conditions.)

Law enforcement agents in Wyoming began watching Kahn and at least one customer fill prescriptions at Casper-area pharmacies on Sept. 8.

The next day, the DCI obtained a warrant from Natrona County Circuit Court to place a tracker on the Kahns' SUV.

During that time, agents tracked the Kahns traveling in the SUV to Arizona. Shakeel Kahn flew back to Casper, while Lyn Kahn worked with customers on how to electronically wire money for the prescriptions.

The warrant expired for this tracking device on Oct. 25.

The DCI obtained a second warrant for a tracking device, which was removed from the SUV 12 days after DEA agents arrested the Kahns at their house on Thorndike Avenue in south Casper on Nov. 30.