My opinion for this shift is that he looks human today, he looks like he cared about Allison, he is facing this head on. IF he did this from the get go, if he appeared to have been concerned, if he showed just in the slightest that he loved his wife, that he was concerned about her welfare, that he actually wanted her to come home then the general population wouldn't feel negativity towards him...
Yes we all handle things in our own way, there is no right or wrong, we have all been brought up differently and have different values BUT I personally cannot get past his behaviour, he appears to be disrespectful of Allison IMO that does not prove guilt, not at all, but he doesn't seem like a bloke I'd want to shout a beer at the pub... But yes today I genuinely feel for him.