Update via AP:
Police in upstate New York say they're using officers, dogs and helicopters to search a wooded area for a convicted murderer who escaped from prison three weeks ago. Another violent inmate who escaped with him has been shot and killed.
Police are swarming the woods as the sun sets in Malone, where they believe David Sweat is hiding. Richard Matt was killed in the area earlier Friday.
U.S. Sen. Charles Schumer says Matt was killed by a federal border patrol agent from Vermont. He says searchers with dogs closed in on the pair after receiving a 911 call from a woman who heard "an intruder" knock on her door.
Area resident Mitch Johnson says his friend Bob Willett has a cabin in the area and heard the "Pop pop pop pop pop pop pop" of gunfire.
After more than two weeks of searching throughout upstate New York, police have located and killed one half of the escaped convicts, Richard Matt, from Clinton Correctional Facility. His accomplice, David Sweat, has yet to be found.
Two prison employees have been charged with aiding the criminals in their escape. They provided Matt and Sweat with tools such as hacksaw blades by hiding them in hamburger meat, among other contraband.
Stay tuned for updates.