stress possible, sightings of brian laundrie, whose fiance, gabby petito was found dead. >> we won't stop until we have these convicts captured. >> reporter: it was one of the biggest man hunts in u.s. history, after richard matt and david sweat pulled off an elaborate escape from a maximum security prison in new york. they used drill bits to chisel their way out of their cells and escaped through this manhole. more than a thousand federal, state, and local law enforcement searched through the neighboring towns, fields and forests surrounding the prison. they also received more than 1400 tips. one of those tips led authorities, first to richard matt, who was shot and killed and then to sweat, who was also shot but survived. they were on the run a little more than three weeks and made