But Anglo will tell you about some old French guy and his theory that something is always left behind and something is always taken. The absence of evidence is not enough for reasonable doubt.
Rudi didn't leave anything in F's room and yet most everyone here is absolutely convinced he accessed the house through that room.
It's time to nail this
canard. The French guy is
Locard. Grinder, a serial lounger on yachts and in condos, with no known qualifications at all, dismisses Locard, methinks too easily.
Let's see what Forensic Science, published by Maelstrom in 2008 says about it:
Forensic Science p.697 said:
This principle, which ties together the diverse investigations of the forensic sciences, has been called the basis of criminalistics. Variously formulated, it is expressed most succinctly as “Every contact leaves a trace.” This applies broadly to interactions ranging from those that leave fingerprints to those that make the markings on a bullet, but it is of particular relevance to what is known as trace evidence. Locard called the microscopic particles that adhere to people’s clothing and bodies “mute witnesses, sure and faithful, of all our movements and all our encounters.”
Almost any kind of trace material can come to the attention of forensic scientists: hair, dirt, blood, fibers, and other substances. Some materials are more individualizable than others, but individuation may not be necessary to raise questions about how the presence of particular materials is to be explained. Because evidentiary use of enchanged materials depends on there being no acceptable alternative explanation for the materials being where they are, issues of chain of custody and prevention of contamination are extremely important.
So, there we have it. In a book.
As to Filomena's room, consider the differences between what took place there and what took place in the victim's room. In the former, Rudy, wearing gloves (an indispensable part of the window-breaking burglar's armoury) breaks the window, climbs the wall, plucks out some shards of glass with his gloved hand, reaches in and opens the window pane and climbs through. He walks through the room to the kitchen. He may have picked up some glass on the soles of a shoe while doing so and I think there is something about this possibility somewhere or other. If he did, that would be in accordance with Locard, but it is not beyond the bounds of reason that he would leave no trace at all and we have to add to this the unfortunate fact that, before we conclude that he left no trace, we must judge the forensic science to be reliable, which it is not.
Contrast the radically different scenario in the victim's room. There a struggle took place involving movement, violence and a lot of blood. We know nothing of transfer from the victim to Guede, except, of course, the cuts to the fingers of his hand, which counts for these purposes, and which survived until his arrest. Had they found his clothes it's a very fair bet they would have found her hair, blood, fibres* etc. on them just as the cops found fibres on the clothes of one of Stephen Lawrence's attackers 18 years after his death in a street attack which involved much less contact than that between Guede and Meredith Kercher.
And I am sure I don't need to reel off the numerous and grossly obvious instances of transfer from Guede (shoe prints, palm print, finger prints, epithelial cells, knife print) but I find I have anyway.
There is transfer in the bathroom, actually, comprising his bare foot print but, as the extract above says:
'Some materials are more individualizable than others ... ' and the bathmat print is unfortunately one of the 'others'.
So let's put this to rest Grinder, please. Alternatively, please cite authority for your apparent view that
Locard is of no weight.
*for the thousandth time, where is the fibre evidence in this case?