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Edited on Thu Apr-12-07 06:35 AM by Justice
As many know, deleted emails are usually never actually deleted. There are thousand of forensic computer consultants who make a living "finding" deleted emails. It is expensive, but they are very effective at finding emails. This is usually because companies back up emails for a period of time on tape. The tapes are reused, and the new data saved over the old data. Consultants can usually find the old emails on the tape, if it is has not been used too many times. Also, people keep emails in the sent mail or other folder on their PC - so they are found there, even though other versions might be deleted.
Many legal cases have turned on these recovered emails - some of them very high profile.
There are also rules that require a party to preserve emails in the context of litigation - and to stop any regularly scheduled back up (writing over) of tapes. I believe some of Congress' letters cautioned the WH to preserve emails - not sure how far and how soon the letters and caution went to the NRC and others.
In addition, if it is found that a party did a massive "dump" of tapes and emails suddenly, and not in accordance with established policy by that company, a court would typically give the jury an adverse inference instruction which says something like - you can assume that the evidence was destroyed because it was bad for the party that destroyed it.
It will be very interesting to see how these principles - developed in the law regarding electronic evidence over the last 10 or so years - will be applied in this situation.
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