I'm not really sure who all is involved in the testing. They have spent nearly a 1/2 million dollars investigating the case. I know they did leave the state to somewhere in Tennesee where they supposedely constructed the house as a model. I know they have been to multiple fire investigation seminars discussing this case with others. No one thus far has given me any information as to anyone questioning the findings of Dr. Dehaan, aside from the defense of course. I have heard briefly an explanation on how he came to his finding, and what went into the full testing, and it sounds very thorough and convincing. On top of the circumstantial evidence. Basically there is so much outside evidence that points to her, that the only way the accused can hope to get away with it, is if they couldn't prove it arson. The only way they can do that, is to get rid of Dehaans testimony, because nothing the defense has come up with to rebuttal comes close.