I listened to all nine episodes. He's hinting that the murderer/murders are either family members or someone close to the family. Having to do with money. Follow the money. 

https://www.thestar.com/podcasts/billionaire-murders/2023/05/19/the-billionaire-murders-the-hunt-for-the-killers-of-honey-and-barry-sherman-podcast-episode-nine.html