The husband of a female prison worker charged with helping two New York inmates escape spoke out on Tuesday, the 18th day of a massive manhunt, saying the breakout plan called for her to slip him knockout pills.

A force of 1,000 law enforcement officers focused the search for murderers Richard Matt and David Sweat in eastern Franklin County, about 20 miles from Clinton Correctional Facility, said New York State Police spokesman Beau Duffy.

The hunt centered on the town of Bellmont, near a cabin where authorities during the weekend found evidence that reportedly showed the escapees had been inside.