I believe in the articles it says it was a composite sketch (sketch 1). IMO it's a blend of what various LE or witnesses and/or scans, etc. saw as the perp, only at the time they didn't realize how much of a disguise he's actually in or discounted it for some reason. It totally resembles what the perp looks like just from the BG image, to me and I assume to most of the public. I'm at a loss as to why it took them so long to figure out this guy is disguised so heavily IMO, wig, mustache, glasses, layers of clothing, perhaps hats,etc.
In the black and white enhancement video done by fellow sleuther Red Beard I believe is the name, at the very end, when the perp lifts and starts turning his head is when you can see his real face. So far, I've seen nothing from LE that dissuades me from that opinion.
I'm not blaming any LE or any other person, this is one clever perp and a very bad image. They are right, LG is a hero just getting the image she got. This perp's days are numbered, thankfully. The psychological damage he has done to even the most seasoned of LE and the community has to be devastating. He has to be taken off the street asap.