good evening. convicted killer david swedat revealing new details about his escape and why he split up with richard matt. he is making a stunning new claim about the woman charged with helping them get away. here is what we know. sweat telling investigators that he ditched richard matt because matt was drinking and oust shapet of shape and couldn't keep up. sweat turning the tables on mitchell. she's in prison herself charged with helping the killers escape. sweat says it was her idea to kill her husband that you see there. sweat says mitchell had a sexual relationship with richard matt but not with him. sweat tonight saying he began planning the escape in january. january all the way into june. he says he was the massachusettstermind of it. they did a dry run he said. they left their cells. they went all the way to the street. they pushed through a manhole cover. they could have escaped that night. when they got out, they saw