Is the 'James Holmes' in Jail an Imposter

Doing the comparison as you suggest:Smiling picture, his face is pointing directly at the camera, possibly turned downard slightly. That makes his nostrils appear different from the other picture.  Grinning like he is doing will bring his upper and lower incisors in contact with each other, jaw closed.   This also puts the eyelids in a relaxed/neutral state.  In the frowning picture his head is turned slightly to his right (your left) making the ears appear assymetrical.   His head is also facing upward slightly, changing the view you get of his nostrils.     He's frowning, this opens the jaw slightly, making him a bit long in the face.   Ever hear that expression, why the long face?   Frowning also opens the eyes a bit wider, giving them a more rounded appearance.  The eyebrows are also lifted giving a higher arch to them.Honestly, some  of you folks need to study some photos showing different emotions on one person's face.   Then you may be able to pull your head out and do a picture comparison.  I suspect the desire to have a conspiracy to blab about will overwhelm any effort you might put into not looking so idiotic.