There's one other piece of evidence that connects to the area 51 alien

>Alleged alien photographed on September 22, 2004 at 10:45 pm with a Kodak DX4530 camera, the photo was taken by a security guard in an abandoned office in Rayones, Nuevo León, Mexico

This being appears to be the exact same species as the one in alien interview footage however from what I can see it looks a little fuller in the face perhaps? The alien in the area 51 footage was having medical problems so it's face looks a little more gaunt that the Mexico photo