I don't think Ferris only worked from photographs - written reports would have been included for him. All or nothing, imo. It would appear that the Ontario pathologists did not mention insects in their reports - at least not that we have ever read. They were the ones that should have said 'no insect activity present.' To me it shows an ineptness - they were paid to be qualified to report on what should have been as well as what was. Ferris mentioning that tells me he was far more qualified.
The wind and birds eliminated all of the insects? Nah, imo. Ferris said there should have been hundreds - I think he was suggesting not all would still be present but some would be left at that point.
I have attempted to address the issue of the missing larval shells or “puparium” noted by John Ferris. It's interesting, Woodland, that you point out that all the other Ontario pathologists did not mention insects in their reports. This could be significant when making assumptions about the expertise of John Ferris. You took that to mean he was more qualified. But, you can flip that around and ask, why does one guy notice that when all the others didn't?
I don't think we can assume any of these specialists are infallible. I'd like to point out (to readers) that John Hillsdon Smith had conducted hundreds, if not thousands of autopsies yet he made colossal errors during the first autopsy of Christine. At the second autopsy, there were three experts in attendance (Dr. Clyde Snow, Dr. Jerry Melbye, and Dr. Hans Sepp, as well as two student pathologists – Guspier and Mullen). I think it's safe to assume that they had access to the same documents and photos from the crime scene that were given to Ferris for his examination. None of those specialists mentioned the issues of missing puparium (to my knowledge).
Woodland, you said, “Ferris mentioning that (the missing puparium) tells me he was far more qualified.” I'm not so sure...
Perhaps Ferris was not such an expert in entomology?
Let me try to make a case.
I've done some research on the life cycle of the blowfly and have discovered a few interesting things. I'm not sure that it
proves what happened to the missing puparium, but it does raise the issue of Ferris's level of “qualification” or knowledge concerning the subject of maggot puparium.
What follows are direct quotes and their sources are noted.
“
These puparia are often present at a crime scene, but not collected because no one is looking for them, or because no one is looking in the right place. They are usually found in the vicinity of the corpse, not actually on it. Folds in clothing are good places to look.
They may also be found up to 30 feet away from a corpse, for example in the deep pile of some carpets or in folds in curtains etc. indoors. If puparia are present at a crime scene, it is very important to find them, because they are the oldest stage one can definitely link with the body.”
From “Forensic Entomology” by Stephen W. Bullington, Ph.D., Consulting Entomologist.
“After more feeding,
the third-stage maggots move away from the body and metamorphize into adult flies.”
From an article published by the U.S. National Library of Medicine.
“
One stage in the metamorphosis of the fly is the migration and pupation of larvae in the ground. Many of the maggots that migrated away from or beneath the body and burrowed a few inches into the ground to pupate, will "over winter" until the return of warm weather. They emerge from their puparia, dig to the surface of the ground, and begin a new cycle of reproducing, egg-laying (females), and dying over a period of weeks.”
and (in regards to the birds):
“In our studies
birds have never been seen feeding on the human body, although
they have been seen feeding on the maggots and carrion beetles.”
Both quotes from “Time Since Death and Decomposition of the Human Body: Variable and Observations in Case and Experimental Field Studies” by Robert W. Mann, 1 M.A.; William M. Bass, 2 Ph.D.; and Lee Meadows, 2 B.A.
“
Fully-fed maggots drop from the sheep and enter a wandering stage. This usually occurs at night in sheep camps. When ready to pupate they usually burrow only 1–4 cm into loose soil.”
From “Sheep Blowflies” by Garry Levot - Principal Research Scientist, Animal Health Science, Elizabeth Macarthur Agricultural Institute, Menangle
“
When the third stage is complete the pupa will leave the corpse and burrow into the ground, emerging as an adult 7 to 14 days later.”
From Wikipedia article on “Calliphoridae” (Blowfly).
“Depending on temperature and the substrate upon which they are feeding, maggots usually complete development in 4 to 10 days.
At the end of this period, larvae typically burrow in the upper centimeters of the soil and pupate for up to a week. Adult flies emerge from puparia and make their way to the soil surface.”
From the University of North Carolina website (http://ipm.ncsu.edu/ag369/notes/blow_flies.html)
So, in conclusion, it seems that maggots, when they are ready to pupate, leave the corpse and sometimes travel as far away as 8 meters and burrow into the ground. This fact might seem contrary to our common sense – but there's the evidence above. When the fly hatches, the puparium is left behind
in the ground, so if Ferris is looking at photographs, he's not going to see them there around the body or on the body.
If evidence-collection was pathetic and amateurish by Durham police (and it was) the puparium were missed because the officers involved had no training or knowledge in this regard. They probably didn't even know to look for puparium or take soil samples some distance from the body.
Police slid C's body onto a board – and they tried to take a few inches of soil with it. This was happening in late December and the ground was frozen, so it's unlikely they removed very much soil from the scene – and the soil they did take was in the wrong location to find puparium. That could be why the Ontario pathologists and forensic personnel didn't note them either. They just weren't there in the samples that Durham took from the scene.
Like I said, all of this proves nothing... but it does raise some significant issues. Does it not?