Joe, Lime actually turns the body into an Ammonia factory and by jacking up the pH the bacteria can break down the more simple organics till nothing is left.The ammonia is derived from the protein material and heat is a by-product, not the cause. Its like a compost heap really. The cloth would be broken down fairly quickly in a humid high pH, warm environment. Having enough DNA left may present a problem. When they tried to do a DNA on George Custer from his grave at West Point, They actually found little useable DNA, what they did find , from dentin in a tooth , and from physical features of Custer and the bones that were actually in the grave, they discovered that there are actually 3 non-coms from Custers Brigade buried in his grave. Most of that forensic evidence was from the physical features of the bones and not DNA (eg, femur was too short for Custer and there was evidence of previous break at the knee,and Custer had no known broken bones. AAlso the teeth in the skull were worn from smoking a pipe, a practice Custer didnt engage in)
The AMerican Academy of Forensic SCience kkeps up a "last word society" in which member MEs and other ghouls report on historical autopsies that theyve been engaged in.
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you can visit the resources section and find information about celebrity autopsies, just in case, they may have some information from the international society about this