There was a regular portable ladder up against the building in plain sight. How it got there and why it wasn’t thoroughly investigated is a big question.
I believe that the gun may have been hidden under a roof panel placed on top of the insulation.
This would be easy with that style of roof…just a couple of missing screws would do it.
I read that some people saw him carrying a rifle on the ground so….
Pure speculation by me….guilty.
Gun could have been propositioned when the ladder was. A day or more before.
Even he could have been propositioned a day before.