Because there just isn't enough surveillance in this country.
The national license-plate recognition database, which would draw data from readers that scan the tags of every vehicle crossing their paths, would help catch fugitive illegal immigrants, according to a DHS solicitation. But the database could easily contain more than 1 billion records and could be shared with other law enforcement agencies, raising concerns that the movements of ordinary citizens who are under no criminal suspicion could be scrutinized.
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