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02/03/10(Wed)08:44:06 No. 7364944 In
real life, when a serious crime is committed, detectives use detective
skills to figure out who probably did it (means, motivate,
opportunity). Then, if they can't get a confession out of the guy, they
call in CSI to gather physical evidence against him to help build the
case. DNA evidence is worthless without something to compare it to, and
while there is a database of criminals' DNA, it contains less than 10%
of all known offenders in the US. This doesn't even mention that it
takes weeks to run. And it's also not considering the enormous amount
of trace evidence that you drag around with you every where you go. You
could probably find thirty different DNA samples on the bottom of your
shoe right now; far more if you live in a city. There's actually
something called the "CSI Effect", where juries have unbelievably high
expectations of the prosecution to provide absolutely rock solid
physical proof that the defendant is guilty. You can google this for a
better explanation.