Is anyone minding the store? More immigration follies in AZ

1 D-M gate-crasher sent to Sonora facility | www.azstarnet.com � :
"The driver of a pickup truck that ran a checkpoint at Davis-Monthan Air Force Base on Tuesday headed back to his native Mexico in an ambulance Thursday and may never be prosecuted, Tucson police said."

The man was the driver of a pickup truck that attempted to ram its way through a gate into a USAF base near Tucson. He had a loaded handgun and a stash of what appeared to be cocaine and reeked of alcohol. But, because state lab tests on the drugs and his BAC won't be available for weeks, local police have not filed charges.

This doesn't explain why federal officials did not file any charges in connection with attempted illegal entry to a military facility or at least use the driver's immigration status - here illegally, of course - to detain him.