I could be wrong, but I was under the impression that the "4th
guy" was the 3rd guy with a moustache.
Evans, the third one indicted, was Image 5 in the line-up, Seligmann was Image 7, and Finnerty was Image 40. The unknown quasi-ID'd fourth guy was Image 4 in the line-up:
http://www.wral.com/slideshow/news/9141851/detail.html?qs=;s=4;w=480
Like the link GAgal provided, in the final lineup she fingered 4 men alltogether.
FOUR.