Another easy and good category of things to look for in the remains of residential fires are large objects that would be impossible to vaporize no matter how much wood you piled up against it: refrigerators, washers and dryers, cast iron bathtubs, porcelain toilets and sinks. Can you imagine trying to burn any of those things away?

Also consider water heaters. Can you imagine a fire burning next to one long enough to boil off 55 gallons of water and then melt the vessel itself? C'mon, man! lol

All those things are standing in plain sight in normal fires. But you look at these suspicious fires and that shit is gone.