Plate readers used to find man shot, killed by police after he hit cop with truck in Va.

A man drove his truck into a police officer causing officers to shoot at the vehicle in Arlington, Va. on May 17.

A technology called an automated license plate reader (ALPR) was used by authorities to capture a wanted man who hit an officer with his pickup truck before he was shot and killed by police on Wednesday in Arlington, Virginia.

The digital camera is attached to a laptop and is used to identify and find suspects.

According to police, the ALPR can take thousands of images and convert it into a digital format that is stored in a database.

Members of the American Civil Liberties Union (ACLU) have filed a legal challenge against the ALPR. The organization says it's not concerned with the technology, but the idea of storing the data for long periods of time, and sharing the information among other police agencies.

Daniel George Boak, 28, decided to strike an officer with his pickup truck on the Glebe Road exit off South Interstate 395 in Arlington, Virginia.

Arlington Police said the incident started when an officer attempted to pull Boak over while he was driving on I-395 at Jefferson Davis Highway.

The traffic stop was attempted after authorities received a lookout from a "license plate reader," police said in a press release. Instead of stopping the truck he was driving, police said Bork took off on the interstate.

The officer reportedly continued on I-395 but did not initiate a police-pursuit. Boak eventually got off at the Glebe Road exit where traffic was too congested for him to continue eluding police. The officer got out of his cruiser and approached Boak's vehicle on foot, but Boak again ignored commands, put his vehicle in drive and pinned the officer against another vehicle. Police said at this point, officers shot back at Boak and hit him.

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