Originally Posted by
Rajagra
Excuse me, but how in hell can DNA evidence prove someone is innocent? All it can do is prove some kind of connection between a person and a place.
It cannot prove a person was not in a given place.
It cannot prove a person did not do something.
You are right that witnesses are unreliable. But so is faulty logic applied to DNA results.
Personally I have grave doubts about the reliability of DNA evidence. There is an assumption that all the "bands" shown in the result are independent, and that you can apply probability formulae as such. What if those bands aren't independent? We are all human after all, and DNA patterns are a blueprint, they have to follow some basic pattern in order to create a human being. All those one in 50 million probabilities they throw out to support their reliability would be completely bogus. I've never seen proof that DNA evidence is as reliable as they claim, yet we are all supposed to accept that it is infallible.
Also DNA testing has become incredibly sensitive. The tiniest amount of material can be tested. We are already past the point where a dead skin cell or hair can fall off, be blown across a city and land at a crime scene, then be used to "prove" a connection. Sooner or later someone will be found guilty of a crime because of this assumption that DNA evidence is infallible, maybe it has happened already.
Sorry, :OT I guess.