Arson

I am too flabbergasted and down to really talk about it, but we've had a meeting with the fire-expert today.
As no cause for the fire can be found, their conclusion is the fire is set by someone in the house as the cellar can only be reached indoors.
As Joel was upstairs, the kids and i were (half) asleep, they suspect Robbert to have set the house on fire.

I know.
I laughed too.
At first.

But their minds are set.
It's just so shocking I am really blown away.