I think we may be getting a little off topic. I follow both the sand canyon and chandler threads very closely as well as this one. I don't think there is any reason to believe they are related to FLEK. Those thoughts have crossedmy mind when researching those cases but I have never found a reason to connect them. I have researched for those cases as heavily as I have for this one. That's JMO.
On the other hand, this present lead is one that should be followed TIL we can rule it out. To that end, I don't see too much of a resemblance in the woman, other than perhaps the eyes and maybe hairline. The man, however, is pretty close on the lower part of the face....jawline, nose, mouth and attached earlobes. A little in the eyes.
I think we should follow this til we rule out their children. It appears we only know of one daughter at this point. Yearbook pictures on that one? Anybody? Anybody?
Their story just fits so well that I think we should conclude it. JMO.