I thought he was an awesome Billy the kid.

Emilio was a fantastic William H. Bonny, even though he didn't entirely match the physical description of the iconic western outlaw. Both men are and were only 5ft5 but Emilio is better looking than the real man who was pretty ugly. Here's a very old photo of him here:

http://www.myspace.com/108152209/photos/2270198#%7B%22ImageId%22%3A191 75237%7D

The movie stuck very close to the facts regarding the history of the man and his band of regulators and Emilio to his credit brought humanity to the on screen character who was portrayed as being a impudent, cocky rogue. You could have even called him a bit of a rascal. You can find details about the real man here and compare it to what was seen in the film: http://www.aboutbillythekid.com/summary_billy.htm

For an even more in depth chronicling of the young outlaws life there is a page on wikipedia with further information about him.