(CNN)Former Minneapolis Police officer Derek Chauvin now faces an additional murder charge in the death of George Floyd after a Hennepin County judge reinstated a count of third-degree murder on Thursday.

Chauvin already faced charges of second-degree unintentional murder and second-degree manslaughter, and jury selection in his trial began Tuesday. He has pleaded not guilty to all three charges.

The added charge provides prosecutors a third potential pathway to conviction in the closely watched case at the heavily fortified Hennepin County Government Center.

"The charge of 3rd-degree murder, in addition to manslaughter and felony murder, reflects the gravity of the allegations against Mr. Chauvin," Minnesota Attorney General Keith Ellison said in a statement. "We look forward to presenting all three charges to the jury."

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