I found it very interesting. Too early to say if he's innocent or guilty but, there are several scenarios that spring to mind .......
He is lying about a reconciliation - he wanted it, she didn't and he found out she was pregnant with her boyfriends child and lost the plot.
They boyfriend found out she was thinking of getting back with her husband and that she was pregnant and had no idea which of them was the father or that it was her husbands child - he saw red.
Things against the husband - he was there and found the body, took a while to call the police (8 mins), called a friend first, was seen outside in the garden - possibly out of breath.
Things against the boyfriend - seemed to have a temper ...........
