Yes I agree, it will point you in the direction of where to look, just a shame so much is ash and may have destroyed the cause. Hopefully they will be able to ascertain what triggered the events that unfolded to prevent any reoccurrences.
I would love to see how they go about it, because would removing the remains to a site to examine them lose evidence when ash is moved? As the ash may indicate sources of fire etc, mind you would bad weather also destroy evidence? Fascinating stuff.