It can place you at the scene, at some point in time. But that's not incriminating, damning evidence in itself. Often its used as conclusive, case shut kind of evidence. So more useful is if they don't find evidence of you there at all. That's pretty much the only way DNA can be used as the only piece of evidence to change a case.
It is routine in a crime scene investigation to take fingerprints etc of all the people who should be there legitimately, and those of the police etc are generally already on file for this reason, so there is no good reason for police etc to avoid leaving prints if they are supposed to be there.
Totally watched a policeman open a door with a hanky the other night. Was like - what the hell for?! Could have even been on Dexter, can't quite remember which.
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Date: 2009-04-30 07:45 am (UTC)It is routine in a crime scene investigation to take fingerprints etc of all the people who should be there legitimately, and those of the police etc are generally already on file for this reason, so there is no good reason for police etc to avoid leaving prints if they are supposed to be there.
Totally watched a policeman open a door with a hanky the other night. Was like - what the hell for?! Could have even been on Dexter, can't quite remember which.