>> reporter: she called it a legal lynching. but authorities here will tell you a jury found her guilty of based on overwhelming evidence. she and her two companions were heavily armed. all had semiautomatic handguns and extra ammo. there were more guns and bullets in the trunk of their car. they had fake i.d.s. they engaged with a shootout with police and executesed trooper werner foerster. the other three are dead, one is in prison and joanne chesimard is in cuba. i spoke with the trooper's son eric who was just three years old when his father was killed. he told me the act fact that chesimard gets to enjoy time with her family and my father does not, it is a loss that will stay with us forever. the superintendent of the new jersey police explains why it is so important to catch her. >> it closes an open wound, rick. it also sends the message as apparently our presence here today that we will not give up if one of our members dies and then escapes justice whether from jail or flees prosecution.