>> there was money there in the form of insurance money. and that in and of itself is a powerful motive. >> he received about $250,000 in insurance benefits. >> the second motive that some of the investigators believed existed was that paul camiolo was tired of caring for his infirm parents. >> fire investigators searched through the rubble and found something very suspicious. >> in the center of the room there was a pattern that looked like perhaps it might have been associated with a liquid pour, what they refer to, when someone may have poured an accelerant. >> to see if an accelerant was used investigators removed samples of the carpeting, the padding and the hardwood floor. the samples were sealed in paint cans to prevent any gases from escaping and sent to the forensic lab. gas chromatography can identify the molecular components of the