so the more I look at the blast pattern and damage, no RV debris, and that "missile video" the more this looks like a thermobaric weapon, example being blu-118. This video of it's demonstrated use shows that exact "spout" of dust and debris shoot up and outward of the entry point of the weapon,

https://www.youtube.com/watch?v=xREme2D3xDA

Then in some cases explosion is instant or delayed for maximum penetration. such as getting into the sublevels from the roof.

If you watch the missile video from Nashville, you'll see a dustcloud expand from 1-2 second which I'm guessing is dust and debris from the concussive impact of the delivery device, then the spout from the entry hole, then the delayed explosion.

Then the "suspect" who was identified in record time by genetics and "buried at sea" - A Q Warner