[cyncooper]

Start here (Under DIRECT exam, not under cross).

I see the marks on the shirt are also called "excretions" and "stains".
http://www.thesmokinggun.com/archive/kobetrane3.html

[Strider]

Thank you.

[Howlin]

First of all, where in what you linked does it say that it was plainly visible to the naked eye?

And you obviously didn't read far enought:

Start HERE @ Line 14; be sure to see Page 14, specifically lines 1-7