High stakes for law
enforcement
In the
aftermath of the terrorist bombing—no lesser word will do—at the Boston
Marathon, a major debate has broken out over the proper law enforcement
procedures in two key areas: general surveillance and targeted searches. Many
insist that a general right to privacy should limit the first, and that concern
with racial and ethnic profiling should limit the second. Both of these
overinflated concerns should be stoutly resisted.
The
task of unearthing terrorist activities is like looking for a needle in the
haystack. Even the best system of oversight and surveillance will turn up an
extraordinarily high percentage of false positives, for the simple reason that
the odds of any given lead providing useful information, although hard to
estimate, may be very small. It takes, therefore, a very large payoff indeed to
justify government action in those cases, which is why police surveillance and
monitoring should receive high priority only in cases where the risk justifies
the large public expenditures and the serious intrusions on privacy of those
targeted individuals. At this point, the questions arise of what kind of
surveillance should be used, and when and how law enforcement officials can
target particular individuals.
The Way Forward on Surveillance
The
Tsarnaev brothers’ attack at the Boston Marathon has brought forth an insistent
public call for an increase in surveillance to detect suspicious activities
before it is too late. To be sure, there are always technical difficulties in using surveillance devices. But
any objection on that ground should be treated solely as means-ends questions,
which can in large measure be answered by improved software in such key areas
as facial recognition detection. The moral, social, and constitutional
objections are sadly misplaced.











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