More on Melissa here and also some more detail on David L. Smith: <a href="https://en.wikipedia.org/wiki/Melissa_(computer_virus)" rel="nofollow">https://en.wikipedia.org/wiki/Melissa_(computer_virus)</a><p>> The virus itself was credited to Kwyjibo, who was shown to be the macrovirus writers VicodinES and ALT-F11 by comparing Microsoft Word documents with the same globally unique identifier<p>Not sure how that explains how the FBI caught David though. Can someone else elaborate? What sort of OPSEC fail is at play here?