Police have expanded the search area for 'Shawshank' escapee David Sweat as they concede he may have slipped past them once again. More than 1,200 officers spent the night standing guard around a three-square-mile parameter in Malone, New York, as State Police insisted they had the surviving escapee 'contained'. It was based on their assumption that Sweat was traveling with fellow fugitive Richard Matt, who was shot and killed by law enforcement nearby on Friday afternoon. However, around 24 hours later, the parameter has been expanded to 22 square miles, as Clinton County sheriff David Favro solemnly conceded there is 'not a heck of a lot' of progress in the search. Torrential rain forecast for the area overnight and on Sunday is also expected to hamper their efforts and wash away evidence.Richard Matt was shot dead by border patrol in Malone, New York, after trying to carjack a camper vanHe was cornered by police who told him to raise his hands. He did not comply so police opened fireWas caught after border patrol officers heard him clear his throat outside a cabin, they now believe he was drunkThe hut smelled of gun smoke and was just south of the Canadian border where pair were believed to be headingHis escape accomplice David Sweat is still on the loose and authorities say he is cornered in dense woodlandMatt's half brother Wayne Schimpf, who testified at his 1997 murder trial, said he was 'relieved' at the outcome
It means the tips that sent more than 800 officers across 400 miles of rural _ were likely mistaken. _ was serving life with no possibility of parole after being found guilty of pumping 22 bullets into a sheriff's deputy before running him over.