. >> so david and susan moore came into our office. >> reporter: susan moore is dave's wife.hing they told us was a wire tapping incident. >> reporter: wire tapping? >> yes. >> reporter: dave and sue claimed that paul tapped his wife's phone to spy on her during divorce negotiations. and, sure enough, here are the court documents. in 1997, paul was arrested on four counts related to tapping both his wife and in-laws' phones. he pleaded guilty to one count of electronic eavesdropping, a felony. the other charges were dropped and paul served no jail time. but the wire tapping story was just a prolog to what they were really there to talk about. >> who do you think is capable or responsible for actually setting up an explosive device in that panel? >> i think, like, probably 90% paul. >> reporter: but dave and susan couldn't really give a reason why paul would want to kill roberto, other than they felt paul just had the kind of personality to do something like that while pete didn't. >> so you don't think peter is capable of actually developing a pretty sophisticated device to c