license plate scanning in AZ
eugen at leitl.org
Mon Nov 24 03:07:10 PST 2008
License-plate scanning catching crooks, raising privacy worries
by Michael Ferraresi - Nov. 23, 2008 12:00 AM
The Arizona Republic
Officer David Callister parks his patrol car under a shady interstate
overpass, angling his cameras to target a flurry of passing traffic. Then he
Infrared units mounted to the front of Callister's vehicle scan the license
plates of a Casa Grande firefighter, an Ohio State football fan and everyone
else who drives past as he hunts for stolen vehicles.
Every plate is photographed, time-stamped, labeled on a GPS map and
automatically logged into an Arizona Department of Public Safety database. An
electronic voice alerts Callister to stolen vehicles within seconds after
they pass, giving him the ability to make quick arrests.
Callister is among the growing number of Arizona officers who use cameras to
scan thousands of plates on a daily basis, sweeping parking lots and highways
to recover stolen vehicles faster than ever before.
In the past two years, the technology has been lauded as more than a tool to
thwart car thieves. DPS claims its program has the potential to intercept
violent criminals and Amber Alert suspects, though lawmakers and activists
raise questions about invasion of privacy for average citizens whose plates
In a state that routinely ranks among the top five in the U.S. in auto theft,
DPS scanned more than 1.6 million plates since introducing its first cameras
in 2006 - leading directly to 122 felony arrests.
Callister, a DPS Border Crimes Unit officer, uses a set of the agency's 25
plate-reader cameras to track stolen vehicles south of Phoenix. He said the
system supplements everyday police work, freeing him from the routine checks
that used to consume his time.
"Three years ago, all I had in my car was a radio to talk to a dispatcher,
and I had to wait my turn," Callister said. "If I was lucky, I could run 10
vehicles a day," he said. "Now, with the plate reader and my computer, I've
had days when I've read over 8,000."
Officers in Valley cities use cameras to recover missing passenger cars. But
Callister said stolen trucks seized on freeways are often linked to other
border-related crimes. Dodge pickups, F-250s, Escalades and Tahoes are more
commonly recovered than the Hondas or Toyotas labeled as the most-stolen
vehicles in the U.S.
"That's not what's going to Mexico," Callister said. "Those are the little
Callister said he uses his cameras to hunt the "baddest of the bad guys" -
thieves wanted in connection to the trafficking of drugs, cash and illegal
immigrants. Gov. Janet Napolitano recognized him in December for using the
cameras to recover 75 stolen vehicles and 140 stolen license plates in a
As Arizona police expand plate-reader technology, officials in California,
New York and throughout Europe continue to add systems.
New York, for example, boasts hundreds of cameras on toll roads, bridges and
overpasses in addition to those on state troopers' vehicles. One such camera
disproved a man's alibi earlier this year, showing his true location the
night a family was slaughtered at their home in 2007, leading to his eventual
conviction on murder charges.
DPS and other police agencies already have proven that plate-recognition
cameras solve crimes. The question is where and how Arizona will expand the
technology in the future.
Impact on Arizonans
Experts believe the influx of plate-reader cameras helped reduce Arizona's
high rate of auto theft, at least in part, because the systems are becoming a
more common aspect of everyday police work.
The arrest of just one auto thief leads to a substantial drop in stolen
vehicles because a single thief can steal several cars in a day or week,
according to Phoenix police.
Investigators believe a recently adopted Arizona law that requires victims to
accurately report auto theft also will continue to help the numbers fall.
Phoenix reported a 26 percent drop in auto theft since 2007. The Arizona
Automobile Theft Authority, a state agency funded by insurance companies,
reported that statewide thefts dropped 11.9 percent last year alone. Arizona
auto-theft rates had been on a slight decline since police reported more than
56,800 vehicles stolen in 2002.
Enrique Cantu, executive director of the Arizona Automobile Theft Authority,
said more Arizona cities have applied for grants through the agency with the
hope of placing plate readers on local streets.
As local agencies acquire the technology, larger agencies such as DPS will
continue to test the next generation of cameras. A wireless plate reader
hidden in an orange construction barrel, for instance, allows an officer to
monitor traffic going the opposite way from the patrol vehicle.
Victims are often grateful to see their stolen vehicles quickly returned by
officers using plate-readers.
Joseph Justice, a north Phoenix resident, said his Chevy Silverado went
missing in July from a Paradise Valley Mall parking lot.
"It's a hell of a feeling," the 63-year-old said. "You walk out of the mall
and see your truck isn't there. You feel like you've been violated."
Justice reported his truck missing around 10 a.m. By 3 p.m., DPS found it.
Callister recovered the truck on Interstate 10 when it passed his plate
reader - along with a Dodge truck that had been stolen from a Goodyear
movie-theater parking lot.
U.S. plate readers were introduced as an auto-theft deterrent, but
investigators talk about using the cameras to create a virtual Arizona crime
map, widening the scope beyond stolen vehicles.
By logging the daily location of thousands of registered automobiles,
investigators may be able to narrow down the locations of people they are
The automated technology, for instance, gives officers the ability to check
the license plate of each vehicle parked outside a known drug house or note
what cars were parked outside a bank before and after a heist.
In October, Callister stopped a motorist on I-10 near Casa Grande for driving
too close to another vehicle. The stop led to the discovery of $175,000 in
cash and raised suspicions of money laundering.
To search for the man's possible criminal associates, detectives could easily
check the list of license plates on vehicles that passed before and after the
Plate-readers might be a boon for investigators, but agencies such as DPS
already have grappled with the possibility of public resistance from those
who fear the technology threatens the civil rights of law-abiding citizens.
Of the thousands of license plates scanned each day, only a small fraction of
the vehicles are tied to some possible criminal activity.
DPS, working with statewide task forces, could emerge as the central agency
to store the data from the scans - but the agency has yet to establish
guidelines on how to use the data and how long that information would be
"That's where some people might consider it an invasion of privacy,"
Callister said, but he downplayed the idea, saying the plates are public
information seen on public streets.
"This database is just a big pile of plates and GPS locations," he said,
adding that the potential to solve crimes outweighs privacy concerns. "If
somebody is involved in a bank robbery, or kidnaps a kid, and they do have a
plate, they can go back to see the vehicle was at a (specific) location."
Cmdr. Larry Scarber, who oversees the DPS plate-reader program, said
information from the cameras is used strictly to prevent crime.
"We have to be very cautious," Scarber said of the records of vehicle
locations. "Right now, we haven't gotten rid of anything."
Police leaders met recently with Arizona Attorney General Terry Goddard to
discuss how to manage the vast amount of data without treading on motorists'
civil liberties or limiting the technology's crime-fighting potential.
Big Brother concerns
A Goddard spokeswoman said discussions about how to regulate DPS plate-reader
data are ongoing.
Alessandra Soler Meetze, executive director of the American Civil Liberties
Union of Arizona, said she is concerned about how police technology could
outpace legal standards.
"The problem is we really have no reassurance it's going to be focused on the
bad guys," Soler Meetze said.
Arizona legislators have provided little guidance on how to regulate the
technology since Mesa police pioneered Arizona's first plate-readers in 2005.
State Sen. Pamela Gorman, R-Anthem, who did not return calls for comment,
introduced a bill in 2007 that suggested DPS should dispose of license-plate
images within 24 hours unless the data is tied to an ongoing investigation.
The bill went nowhere.
State Rep. Jerry Weiers, R-Glendale, has introduced legislation to help fight
license-plate fraud and is a supporter of plate scanners. He said he hears
more opposition to automated enforcement technology from legislators seeking
to regulate government surveillance than from constituents who want their
stolen cars back.
"Big Brother - it's one more thing where people are concerned that the
government is looking at you," Weiers said.
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