It's funny that you made this post critisizing that employee, when you actually sound pretty ignorant yourself...
It's possible they carried an anery, just very unlikely. I'm guessing it just was dark and the pigment wasn't bright and easily seen. It is even more unlikely that they would have a locality (hog island, suriname, guyana, etc). I can almost guarantee you it was a normal columbian.
It's just silly of you to make this post about how you know so much more than they do