The only conclusion one can come to by getting dressed in one's work uniform and pretending to go to work (to your spouse) is that one wanted the day off w/o any interference by anyone (unless you want them to know). He lied and created a ruse. For what reason, I have no clue, but he did.
The last phone call reported was a 7:41. Could it be that he noticed his wife's friend behind him and turned off the phone after the last call? His wife said when she tried to call it rolled right over to voicemail...so that means it was off for whatever reason.
He then, verified by witnesses, stopped by a regularly frequented place to purchase breakfast at 8:00.
I'm probably jaded, but this whole "happily married, no problems" statement that comes out initially usually means the exact opposite in cases like this. A most recent example here was Wazineh.