Consider the sniffing-dog problem posed at the end of the last class. Usually you get the owner/trainer testifying, and most often these are not law enforcement people (or at least they are doing this on the side): LEAs rent the dogs' services. So they'll talk about the dog's training regimen, how the dog is rewarded, and so on. They anthropomorphize like crazy, and are not forthcoming about error rates.
Note that in Zapata the dog alerted in houses that the defendant had lived in (4) over the previous 30 years, and a rental car and a storage unit: did this support the conclusion that he had stored his wife's body and moved it? The handler testifies that in her opinion, human remains were at some point located in each of these 6 locations. Trivia: the term "cadaver dog" is a misnomer-- the dogs sniff only human remains: could be hair, teeth, fluid, etc., and not necessarily a dead person (e.g., blood from your bloody nose, etc.). So the dog is not a dead body detector: it's a decomposing human material detector. Anyway, is that testimony admissible under Walstad?
Well, clearly, having a dead body in his basement would be a material fact. And this makes it more likely (assuming the dog really alerted, and alerts have some worthwhile meaning), so it's relevant. But if the dog is not accurate, how is this relevant? In order to make a material fact somewhat more likely, in other words, there has to be some measure of reliability. Also, note that there are two actors involved here: the dog alerting, and the handler interpreting what is an alert-- so do we have a truly blind test? Was the handler told that law enforcement expected to find remains here?
Would testimony via Ouija board be admissible under Walstad? Relevance just has to turn on some notion of reliability. Evidence has to assist the jury. So it's different from the Daubert explicit formulation, but it's not as though WI escapes reliability entirely.
Patrick Fiedler was the judge in Zapata, and he excluded the testimony of the dog handlers, because they had such a high apparent error rate. This is a very close call, though, and not all judges might rule the same way.
What do we need, in order to qualify for the exception:
How do we get this in? Remember that Diane is a declarant.