There's something in his right hand pocket that creates an odd shadow, and there's some reason that the left side of his face cannot be sharpened in any way - best guess is that his left hand is raised and partially obscures his face.
My impression is that he is overdressed for a reason. Did he see the girls when they were dropped off and therefore decided to dress in a way that would leave him difficult to identify, regardless of who saw him? No one who did see him would be able to discuss his hair style, colour or length, or whether he is partially bald, because that is all camouflaged by his two hats. If he was seen wearing a hoodie earlier on, people may not connect him with the photo where he is wearing a zipped up coat.
This is a bit off topic, but in the Highway of Tears investigation, police spent time checking vehicles travelling the highway. What resonated with me is that they were shocked at how many vehicles had disabled door release handles, zip ties, duct tape, and many tools used in abduction. It suggests that too many people are interested in abducting women (esp.) and that when they see an opportunity, they act. The suspect here may be in that category, where he is always ready to attack and is always looking for an opportunity. He may routinely dress as he is in the photo during abductions not only because he is difficult to identify, but also because he would never dress that way around people who know him. Obviously I don't believe this is the first time that he has abducted and murdered a child or woman.