New York inmate explored tunnels under prison for months before escape: report

David Sweat, 35, and Richard Matt, 49, escaped from the Clinton Correctional Facility in Dannemora, N.Y., on June 6 after they cut through their cell walls, carved a hole in a steam pipe and made their way to a manhole cover outside the grounds. After an extensive manhunt, Matt was shot and killed by a federal agent on June 26 about 27 miles (43 km) away from the prison. Sweat was shot and apprehended two days later.