According to Greek mythology, the seer Laocoon, a priest of Apollo, warned the residents of Troy against accepting into their city the giant wooden horse designed by Odysseus and created by the architect Epeius. His famous warning, "Trojans, trust not the horse. Whatever it be, I fear the Greeks, even when bringing gifts," applies equally today to importing unknown files as it did to the Trojans 4,000 years ago.

We think we know all about the dangers of Trojan horses, but there is a new and more dangerous legal wrinkle to consider. In the past few months, a couple of people in England were acquitted based upon the so-called "Trojan defense" -- what we criminal lawyers used to call the "SODDI" defense: Some Other Dude Did It.

The Trojan defense presents two equally frightening problems: the possibilities of acquitting the guilty, or convicting the innocent.

By Mark Rasch at SecurityFocus.

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