josh mankiewicz (voiceover): who would want to kill peggy nadell, and why? attorney richard moran thought he had an answer for that second question. financially, she was in pretty good shape. very good shape. josh mankiewicz (voiceover): peggy and her late husband had built quite a large nest egg. all in all, the estate ended up being worth about $4 million. well, you've probably seen people kill for a lot less. a lot less. josh mankiewicz (voiceover): and who would stand to benefit? craig melvin (voiceover): coming up. i felt very early on that it was most likely a female. craig melvin (voiceover): a closer look at susanne. you pull the knife out. and you tell the police right away, oh, you're going to find my fingerprints on the knife. craig melvin (voiceover): a few million motives for murder? my mother's worth high seven figures. this is not the way i wanted to get my money. money. that's the exact word she used. craig melvin (voiceover): when "dateline" continues. an alternative to pills, voltaren is a clinically proven arthritis pain relief gel, which p