Why wasn't the driver charged???

http://kvoa.com/Global/story.asp?S=5760113

Mohave County sheriff arrests 16 suspected illegal migrants

LAKE HAVASU CITY, Ariz. -- A Mohave County sheriff's deputy arrested 16 suspected illegal immigrants Friday after he pulled over a suspicious van and discovered it packed with people, authorities said.


The van was traveling on Highway 95 in Lake Havasu City Friday afternoon when the deputy became suspicious of its license plate, which appeared fake, said sheriff's spokeswoman Trish Carter.

When the driver pulled over, the deputy found he had 16 people with him in the van, Carter said. Lake Havasu police helped transport the suspected immigrants to the sheriff's substation to be turned over to Immigration and Customs Enforcement agents.

The driver of the van, a U.S. citizen, had not been charged with a crime Friday evening.