LAS VEGAS -- A grand jury will hear results of a criminal probe of a 2008 hepatitis C outbreak involving Las Vegas colonoscopy clinic patients.

Clark County District Attorney David Roger said prosecutors plan to present the case to a grand jury during the next two months.

Dr. Dipak Desai, who owns the Endoscopy Center of Southern Nevada, is expected to face criminal charges.

“The nature of the charges are obviously patient neglect for the alleged infection of these patients with syringes and other medical instruments,” Roger told FOX5. “We're also looking at fraud involving insurance claims."

A health investigation by the federal Centers for Disease Control and Prevention in Atlanta and the Nevada State Health Division Bureau blamed injection practices at the endoscopy clinic for exposing patients to hepatitis C.

The first case of hepatitis C that was linked to the Endoscopy Center of Southern Nevada was reported on Dec. 4, 2007.

In the months that followed, 50,000 people were told they may have contracted the virus at the clinic and others owned by Desai and his partners.

Between $16 and $21 million was spent investigating and testing patients, according to the Southern Nevada Health District.