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New York prison escapee Richard Matt was drunk when he was shot to death near the Canadian border in June, authorities revealed Wednesday.

Citing new results of Matt's autopsy, the New York State Police said Matt had a blood alcohol content of 0.18 percent — more than twice the 0.08 percent that is considered too drunk to drive a car in the state.

Matt, 49, and his accomplice, Richard Sweat, 35, both convicted killers, escaped from the Clinton Correctional Facility in Dannemora, New York on June 6, and remained on the run for three weeks.

New York State Police released these "progression" images of escaped inmates Richard Matt, left, and David Sweat on June 17, that show what they may look like after 10 days on the run. New York State Police

On June 26, members of a U.S. Customs and Border patrol tactical team found Matt hiding in a wooded area south of the town of Malone. Authorities said one of the members shot him when he refused to comply with orders to surrender.

The autopsy also revealed that Matt was shot three times in the head and died from severe skull fractures and brain injuries.

Sweat was shot and captured two days later, also near the Canadian border. He is back in prison, and has been returned to prison.

A Clinton seamstress, Joyce Mitchell, had admitted helping the escape.