Also at the link is this June 7 Orlando Sentinel Photogallery of Trayvon Martin over the years and it includes some that others have disputed as valid, including the Trayvon with gold teeth:
Once again, I might be wrong, but it sure looks like they have different hairlines to me.
It's hard to find a picture of the "Trayvon" in the white shirt that does show the hairline. Most have the forehead cropped off, including the one in the Orlando Sentinel Photogallery. Why is that?
Here's a link you might find interesting: WITNESSES