I want to talk about KM for a minute.
I still don't think he was at 4J, only his phone.
FD left his dinner party, as one does, and met up with KM. Why? KM also needed more groceries? I think not. (If they were meeting in the morning at 4J, why would they need to meet up the night before? Makes no sense.)
I believe they were reviewing their plan, KM was turning his phone over to FD so MT could manipulate it in the morning, to give the appearance that KM himself was there for that meeting that never was.
And why?
Was FD simply layering his alibi? To make it appear that, not only was he in his office taking phone calls (no, he wasn't. MT was there, with his phone, screwing up her one job spectacularly) but that KM was also there (no, he wasn't) in order for it to appear he even had a witness to his presence there (which, of course, he didn't because IMO neither of them was there).
So why then?
I think it's because both FD and KM needed alibis for the morning.
I don't think FD intended to kill JFd in her garage. He did intend to kill her, just not there. So what was the plan? This: gain control of her by whatever means. Zip ties. Drive her away from Welles in her own vehicle.
Then what?
He wasn't going to be able to park alongside the Tacoma and walk a woman bound with zip ties to the Tacoma....
This is where KM comes into play. IMO the plan was always to move JFd from her Suburban into another car away from the busier street at Waveny Park. Then FD drives JFd's vehicle to Waveny, abandons it, saunters casually to the Tacoma and drives away.... no blood to be had.
But IMO JFd fought like a mother tiger in that garage, fought for her life, fought to tell her story all over that garage, fought to protect her children with her very blood.
IMO eventually FD got JFd into her Suburban, in the back, on the bedliner. I believe he still met up with KM on a back road somewhere and transferred JFd into the vehicle KM was driving (likely FD's older Suburban), possibly into a Thule.
From there, KM would have driven IMO to 80MS, FD would have driven to Waveny. I think they must have forgotten a bag from Welles. Meant to dump it in the 2nd Suburban, missed it, and FD had no choice but to transfer it to the Tacoma where it seeped out.
At some point, IMO KM and FD reunited at 80MS where MT eventually joined them, returning each to his phone.
In the original plan IMO this was all supposed to happen in short order, getting KM's phone back online so he could resume busyness. A meeting at 4J and then business as usual. And FD would appear to have had a morning meeting and a regular work day at 80MS.
He didn't account for Welles taking so long. Horrors what JFd endured and succumbed to in her very own garage, but a hero in her own right. Her fight is what secured his arrest and ultimately protected her children from him ever getting them again.
I am ready to hear from KM.
JMO