but david marshburn at least gave them a chance to heal. >> he ended a suffering for my family. where we're sitting here, agonizing for these last two years. he was the one who was able to come in and end this for us. and to make it to where you can try to start rebuilding and doing things that will make kelli proud and to live your life. >> the family also had something for david marshburn. a very special gift from kelli. >> kelli'ds dog tags. which, that's a great honor in itself. >> this is a very important thing. >> yeah. >> for a soldier. >> i always have these. these will stay with me forever. >> that's all for this edition of "dateline. " i'm natalie morales. thank you for watching. watchin as soon as she was killed, we all knew who did it. as the months went on, we just realized that this guy's going to get off. how is this happening? >>> hello, i'm andrea canning, and this is dateline. . >> my friend called me and she was hysterical. she said sandra has been killed. i was like, oh, my god. as soon as she was killed, we all knew who did it. as the months went on, we just