BBM. Also I think it was in Maria's video, it was said that WM wanted to go back to the culvert to retrieve the body and 'bury' it.
I suppose that could be to hide the body better, but I am wondering if the initial dumping was a lot due to Sini's suggestion of what to do with the body, and maybe WM does feel more for Sherin and does deep down want to give her as close to a proper burial as he can, something closer to the Christian burial that she ought to have (in a Christian family), and maybe even have the work of digging with a shovel to do that burial, and then maybe put some crossed sticks over it...
Okay, a lot of that is probably my imagination working overtime, but psychologically men don't usually 'bury' children that they've abused, I believe? And wanting to 'bury' is, I believe, usually done where there was love for the deceased, and remorse for their death, from a psychological standpoint I mean. There are statistics/studies on the subject that should be available online.
I also think that if WM is the abused spouse that he's so far down the rabbit hole that not only could Sini say that Sherin fell off the couch and him believe it, but that his brain wouldn't allow himself to actually put 2 and 2 together and blame Sini. I'm not saying I find him to not have responsibility, but that look in the custody hearing makes me think he is just not fully with this world.