manhunt. multiple law enforcement sources say rich art matt has been shot and killed and police are in hot pursuit for david sweat. the breakthrough follows the discoveries of what police called conclusive evidence. let's go to our national correspondent deborah feyerick. what are you learning? >> what we are learning according to multiple sources that all or correspondents are speaking to and that is that rich art matt has been shot and killed. shots were fired at a camper van, that camper van then calling 911. it may have been those shots that essentially exposed the two prisoners and where they were located. we are told that as of right now, there are no eyes on david sweat. that meanwhile they are chasen him, somehow he managed to elude authorities, but he is now alone. these men spent three weeks together even longer planning this escape.