The fire marshal, Glenn Morshower, tells Det. Vera, Jeremy Ratchford, that an accelerant was used in the fire. "Butane, propane, maybe gasoline, same result. You have your pour patterns on the floor right there." Butane and propane can only be in liquid form when under intense pressure.
Butane boils into a gas at -1°C/30.2°F. Propane boils into a gas at -42°C/-43.6°F. neither of these could have been "poured" in order to leave a "pour pattern".