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DALLAS (CBSDFW.COM/AP) — Federal prosecutors say seven people have been convicted of operating a North Texas “pill mill” that conspired to illegally distribute prescription drugs.

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Prosecutors said in a statement Monday that Dr. Theodore Okechuku of Plano and three others were found guilty by a federal jury of charges that include conspiracy to unlawfully distribute a controlled substance.

Okechuku’s attorney, Victor Vital, says they will appeal the verdict. “We tried the case as bet we could. We thought we tried a good case. The jury’s verdict is what it is.”

Three others pleaded guilty prior to trial.

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Authorities say Okechuku operated a Dallas medical clinic that functioned as a place to unlawfully obtain prescriptions.

Drug dealers who were part of the conspiracy recruited people from homeless shelters and elsewhere to visit the clinic. Okechuku was paid for visits and then those receiving prescriptions were taken to pharmacies to obtain their orders. The dealers then sold the drugs on the street.

Sentencing is scheduled for January.

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