A new National Academy of Sciences report has found that many of the clever ways crime scene investigators analyze evidence and find suspects is itself suspect and not based on a lot of science.
But forensic evidence is one of the most widely used practices in the criminal justice system. And, to call much of it unscientific could send shock waves through law enforcement agencies.
The report found that so many of the methods investigators use have not been properly studied to determine how scientific they really are.
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