In discussing this episode with my spouse, he made the observation that Radford was looking for something to "solve" the mystery, and found it by latching onto the fact the witness had seen the movie Species some weeks prior to her sighting. How much earlier did she see the movie? What other potential things could account for the chupie sighting? Did Radford go looking for this and pulled it out -- er, "lead" the witness in other words, akin to what UFO abduction researchers who use hypnosis are accused of doing? Asking the leading questions until you find yourself where you want to be in the explanation paradigm?
Interesting thoughts. But, as Radford commented on my first post on this topic, there are about "two chapters" worth of analysis that I am unaware of, not having read his book.