Look closely at that warrant. What I noticed when the Search Warrants were released was that pages 1/8 to 3/8 and pages 7/8 and 8/8 were released (as well as an addendum page revealing evidence taken), but that pages 4/8 to 6/8 were missing. And those pages that were released do not indicate the date/time that FD's 2015 Chevy Suburban was captured on surveillance in New Canaan.
So, I don't think we can presume this was a day or two before as it could just as well have been the morning JFD disappeared. That is, FD's 2015 Chevy Suburban may have been in New Canaan at the same time that the Toyota Tacoma was there - perhaps to transfer JFD's body to from her own Suburban.
Is it possible LE did not release pages 4-6 of this particular warrant when the rest of the pages were released because they were still attempting to get information from KM that might help in the conviction of FD and MT, and those pages were critical to that negotiation?
Note that MT driving the white Jeep and FD driving his Chevy Suburban arrive in tandem (FD following MT) at 80 MS Rd at 1:36 pm. And nothing on MT's activity log ("alibi script") from around 11pm or so (when she claims she went to say "Bye to Petu") until she is seen on surveillance showing up at 80 MS Rd at 1:36 can be independently verified. And on that same activity log, MT claims she was at 4JC from noon until 3:30 at which time she then claims she took cleaning supplies to 80 MS Rd.