Well, she was probably charged for failing to produce ID to the Feds who arrived at the security guards prompting. The security guard works under the auspise of the federal government but can only detain, not arrest and so had to call in the big boys. In fact only a registered peace officer (a real cop) can demand your ID but a security guard may deny entry to private or government property for failure to produce ID on demand. It would seem the bus she was on passes through a federal property. Denver or the feds should re-route the bus or have a checkpoint at dis-embarkment anywhere on the federal property rather than harrassing innocent people trying to get from point A to point B if those points have got nothing to do with the feds in-between.

Thats all I can tell from the articles which were rather small and lacking detail. The bus passes through a federal facility, they should retool that so only people getting off show ID. Sounds like a pretty ignorant arrangement if they're checking everyone just for being on the bus. Besides needlessly harrassing citizens it seems just plain inefficient (the feds being inefficient?? Crazy man!)