Wow, I find it hard to believe that this person finished 4 years of college and has a science degree. The letter is very poorly written. Their "style" isn't anything like that of a scientific paper (they don't use MLA or APA). By the time you spend 4 years (or more) getting a degree, you've written PLENTY of papers and you're pretty comfortable with what you've learned. You don't spontaneously switch from "scientific minded writer" to "junk-science writer". I've never experienced it, anyway.
I would take this letter (and the information it provides) for what it's worth...not much. It may be written a little better (and it may make a little more sense) than the others we've read, but that doesn't mean it's any more credible than the letter about "Orlando's Finest".
I wonder why all the effort that WS, LE, the prosecution, and even the defense has put in so far hasn't produced ANY of these people... perhaps they only exist in the imagination of KC, CA, GA, et al.??
I'm very interested to see if you expert sleuths can hunt down the peeps that were named in the letter... if anybody can, WS members can! Maybe some of their info will prove to be useful (if there is any truth to it).