The nondescript black cameras are mounted near each entrance of the Las Americas Premium Outlets, capturing the license plate, make and model of every car that enters the mall parking lot.

“As soon as you come in, it's in the system,” said a former worker with Simon Property Group. The company is the largest owner of shopping malls in the country, including Las Americas, the sprawling complex next to the San Ysidro border crossing.

At first, he embraced the automated license plate reader (ALPR) cameras from Flock Safety, an Atlanta-based surveillance technology company. The former employee believed the ALPR system would help address shoplifting and solve serious crimes that occasionally happened around the mall, like robberies and vehicle theft.

And then he realized the power — and scop

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