Until five years ago when I moved to another state, I had been a resident of the area where the crime occurred for more than 50 years. This crime has a different feel to it than most I have followed and certainly is different from crimes that typically happen in this area. It's more calculated and rage-motivated, IMO. I'm shocked and horrified that someone took this mother from her children and pray that the murderer will be apprehended soon.
Some ideas I keep coming back to as I ponder the theories of more experienced sleuths:
1) It's a sad fact that many people have affairs, but not many of these situations result in murder. What (if we assume that one or both parties had extramarital dalliances) makes this situation different from what other couples in the same situation face?
2) If the murder was indeed planned, what would have happened if it hadn't rained on that particular day?
3) If the planned murder was definitely going to occur during that week, was the home setting avoided out of concern for MB's family or out of fear of discovery since more people (neighbors, etc.) might witness the activity?
4) While I don't think that there were multiple perps, it does remain within the realm of possibility. However, if there were two unrelated perps, there would, IMO, be a higher likelihood that one perp would turn on the other under pressure. The only situation in which I believe two perps would make sense would be if multiple unrelated persons had a high-stake reason for wanting to eliminate MB.
I realize that some may view lengthy discussions on certain topics as a waste of time. Brainstorming and turning every stone could provide the key to solving this case, though.