RSBM for focus
To the best of my knowledge, neither LE or Wes has ever said his vehicle did not match.
In fact, one of the many questions Wes seemed to avoid answering was what type of vehicle he was driving at the time of Ally’s murder.
At least one poster asked the same question about his brother and father, and that was completely ignored as well.
Even if he refused, LE might have been able to obtain a warrant to search Wes’ vehicle as “Police had grown suspicious of Wes Sutherland from the first time they interviewed him, believing he was lying and withholding information.” As for family members, it would be a different story, IMO.
One poly came back as inconclusive, and he failed another:
“‘They said that the first one was inconclusive, and then they said that I failed the second one,’ said Sutherland.”
As to his demeanor, there are a couple of things I noticed while watching the CWD interview (MOO):
1. It has always bothered me that he does appear to be upset (crying, red eyes, etc.) when he tells Chris Hansen how “extremely painful” to be looked at as a suspect, but not when he talks about Ally. (@4’12”)
2. It almost scares me that he answers “Absolutely not,” but at the same time nods his head when asked by Hansen “Did you kill Ally?” (@4’40”)