I didn't see it, but they may be talking about letters sent snail mail to Patsy that were forwarded unopened to the BDA or the photo Karr sent to Tracey (but may have been electronic, not sure about that) allegedly of himself as a child with a white Santa bear similar to the one in JonBenet's room.
yes, I had heard silverman talk about the letter - tonight, he called it a "package", but it could well be the same incident.