He explained how all combustible material inside a room catches fire, including the floor, during a frequent fire event called a flashover.Lentini attacked Vasquez's findings that burn patterns on the floor are also proof that an accelerant was used, noting that those patterns are caused when objects on the floor protect certain areas of flooring from the fire.He said arson investigators at one time believed that "V" patterns of fire damage showed points of origin and that… [read post]