New York State Police/AP
November 13, 2015 04:05 PM

On Friday, David Sweat, one of the two convicted killers who spent three weeks on the run this year after escaping from an upstate New York prison, pleaded guilty to criminal charges related to his June 6 escape.

The Clinton County District Attorney s Office confirms to PEOPLE that Sweat, 35, appeared before Judge Patrick McGill on Friday morning and pleaded guilty to two felony escape counts and one charge for promoting prison contraband. He now faces an additional 7 years in prison, though he is already serving life without parole.

Sweat will be sentenced on February 3, 2016, according to a statement from the office of District Attorney Andrew Wylie.

Wylie will seek a restitution order from the judge directing Sweat to pay nearly $80,000 for the damages incurred to the walls and piping at the Clinton Correctional Facility in Dannemora, New York, during the June breakout.

Sweat is currently being held at Five Points Correctional Facility in Romulus, New York, and has been in solitary confinement since being apprehended in late June.

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Sweat escaped with Richard Matt, a 49-year-old convict who authorities shot dead on June 26. Police caught up with Sweat two days later, shooting him and taking him into custody.

“Today s plea by Sweat brings this matter to a conclusion without the state incurring any more financial expense,” Wylie said in a statement.

Two prison workers who helped aid the escape have also been charged.

Joyce Mitchell, a 51-year-old seamstress, was sentenced to up to 7 years in prison for supplying the inmates with tools they used to carve their way to freedom.

Gene Palmer, a corrections officer, faces charges of official misconduct, promoting prison contraband and evidence tampering in connection with the escape, but has pled not guilty and maintains that he did not know of the convicts’ escape plans.

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