RAND,
You may be interested in this news article about digital evidence in the justice system.
<http://www.chron.com/cs/CDA/ssistory.mpl/tech/news/2391766>http://www.chron.com/cs/CDA/ssistory.mpl/tech/news/2391766
jIMMY
Thanks for this excellent URL - It reminds us to think of the chain of evidence when looking at a picture.
AZ