Burn pit evidence:
In Avery's case, the defense attempts to provide proof that bones had been moved to the burn pit from another location. Leslie Eisenberg, a forensic anthropologist, gives testimony regarding the bones found on the Avery property. She states that a fragment of almost every bone in the human body was found in the burn pit, which she believed to be the primary burn site of the body. She suspected two bone fragments found in a quarry on the Avery property appeared to be human pelvic bone. However, these bone fragments were never linked to Teresa. If the bones had been moved to the burn pit from another location, she would've expected to see breakage due to transport, which she did not see. She finds it "highly unlikely" that the bones were not burned in the fire pit.
Additionally, Rodney Pevytoe, who worked with the Arson Bureau at the Wisconsin Department of Justice, testified regarding his work in investigating the burn pit. He found wiring from in excess of five steel-belted radial tires in the burn pit. He found bone fragments "inside the wire, deeply inside of it in some cases [...] to the point where I actually had to, physically, pull apart the wire in order to get it there." The bones could not have been thrown on top of the wires after having been burned- they were most definitely burned with the tires found in the burn pit. he also testifies to the heat generated by tire fires, stating the average tire can generate twice the amount of BTUs that an average home furnace does, and the polyurethane foam found in the van seat also burned in the fire is referred to as "solid gasoline" by fire investigators. Burning a body in a fire pit, accelerated by tires and polyurethane foam, would've been possible and taken several hours. There were also a number of implements found near the fire, with evidence of charring and oxidation, that clearly had been used in the fire pit at some point. A rake, which could've been used to stir the fire and had wires from steel-belted tires in its teeth, and a spade and screwdriver, which could've been used to chop up bones as the fire died down, where all found near the pit with evidence of charring. The soil in the pit was consistent with what soil looks like after being exposed to the oils from burning tires.
Dr. Scott Fairgrieve, who had not worked on the case, had been contacted by Strang and Buting and shown pictures and reports. He said that he could not, in his professional opinion, conclude with perfect certainty that the remains had not been moved. He stated that in cases where bones were moved, the majority of the bones ended up in the location the bones were moved to, not the original burn site.
- See more at:
http://stevenaverycase.com/was-evidence-planted/#sthash.G4A7Si9n.dpuf
Pretty solid evidence that the body was burned in the burn-pit and not moved from another spot.