@fadedglitter Thanks for sharing the podcast summaries, since I can't access them.
Interesting to hear that KD thinks the WM was the lookout and not the actual killer. I've often thought that the WM disguised his silhouette (and any equipment) by wearing a backpack in front and zipping his coat over it.
My personal theory has always been a contracted killing by an ex- Mossad, special forces, FSB/SVR type. I realize that sounds fictive but due to the Shermans' wealth and prominence I think this is a case where an outlier theory is reasonable. Also, I don't think any of the suspects in the Shermans' circle would have been physically or mentally capable of committing the crime themselves.
Although I would expect that a trained person wouldn't have trouble killing two seniors on their own, it also seemed odd to me that a professional would commit the crime alone. For that reason, I think KD's theory about the team seems reasonable, but we have no known evidence of anyone other than the WM. I wonder what KD knows that makes him conclude there were two other killers not (known to be) caught on video.
IIRC in other comments KD has said that he thought the person who procured the murders was present. To me, that seems unlikely. Again, I wish I knew what made him think that.