Article: DNA testing: ; Good or bad for justice?

SAN FRANCISCO - Eyewitnesses may be uncertain. Lawyers may bungle. Cops may err. But a $10,000 Zeiss microscope is as close to infallible as you can get. Besides a world of hurt, criminals often leave behind traces of themselves - blood, hair and semen - that can be used to convict them or to clear others falsely accused of their misdeeds. DNA testing is the key that can unlock the door to the truth in many of the toughest cases before our courts.

With the technology available in many cases to prove or disprove guilt scientifically, the questions left to politicians, law enforcement authorities and legal scholars are these:

When do we set aside what our very fallible eyes and ears tell us ...

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