I wonder if the accused CSK left his 2 alleged murder victims out in the open, i.e. NOT buried, because he knew that sunlight, rain, and water can degrade DNA samples????
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"....DNA must be in perfect condition before it is of any real use in a criminal investigation.
Leo Freeney: Well first of all, we start off with the perfect sample, and I'll state that say a bloodstain was shed on a handkerchief, and the handkerchief was kept in a cupboard, out of sunlight and it was dry, the DNA in that sample would be viable for thousands of years, and you'd be able to get a full profile from it.
If that handkerchief was left exposed to sunlight for a day or so, the DNA would be more than likely inactivated, and that's because of the action of the UV light in sunlight. One of the ways we decontaminate our cabinets is by the use of UV light. We turn it on overnight when we're not using it, and that gets rid of all extraneous DNA. So UV light can burn your skin, it can burn DNA.
Now when you get other circumstances such as rain, rain will wash it away obviously. If it's exposed to the elements; if you've got a human body and tropical weather, any surface DNA that's present from say a perpetrator, would quickly degenerate in sunlight, and would also degenerate under the influence of bacteria which feed on protein, which feed on DNA.
If there was semen in the vagina of the dead body, it would tend to last longer than anything that was left on the skin, that was exposed to the elements, but would eventually succumb to the bacterial degradation.
Gerald Tooth: What sort of time line are you talking about in those sort of circumstances, a body left exposed to the elements? How long would DNA evidence left on that body or in that body, be viable for?
Leo Freeney: Now the DNA found on a body would probably not be viable for longer than a day I'd say, if it was blood; if it was semen, longer. Depending on the environmental conditions, it would depend on whether it was raining, it would depend on how hot it was. You can think of it in terms of this: if you can spoil food, the conditions which will spoil food and make it unsuitable for eating, will also spoil DNA, because DNA after all, is a biological entity and will degrade just the same as all other biogical entities. So if ever you freeze food, it will last a very long time; if you dry food it will last for a very long time, and that's exactly the same for DNA.
Gerald Tooth: Leo Freeney.
In Perth there were no fresh crime scene samples to be snap frozen in the forensic laboratory.
Both bodies in this case were left exposed to the elements for long periods of time. Nearly eight weeks in Jane Rimmer's case and nearly three in Ciara Glennon's. During both those times it had rained heavily.
The police were not left with much. "
BBM
http://www.abc.net.au/radionational...ge-of-our-convictions---the-claremont/3473202
I had always thought he left the victims out in the open as he was very confident about there being no connection what so ever between him and the victims.
This is why I think he didn't actually ever talk to his victims in the bar or club on the night he abducted them. He hunted in a social circle totally removed from his own so that he would not ever be recognized by anyone in the area. He coveted the 'rich' girls because it's what he couldn't have. They were easy targets with their entitled bulletproof attitude to life. (False sense of security being in Claremont )
IMHO