voluntarily vanishing would be remote. but can you from a burned-out vehicle glean any valuable forensic evidence that could help? >> yes, you can, and that's an excellent question. the technology that we have now as far as investigating burned-out vehicles, burned-out homes has really advanced a whole lot, gregg. there are some methodologies that we can use to get dna evidence even from a vehicle that's been burned up, believe it or not, and other types of evidence as well. the other thing that's very significant about a burned-out vehicle is that we can quickly determine what type of device was used to incinerate the vehicle, whether or not it was a cooking oil, fuel oil, something like that which also would provide significant clues. gregg: well, there are no suspects, right? but a person of interest? >> well, the police have not named a person of interest. now, i have been following this case pretty closely, and just so that the viewers know that donna