[tomonl]

> Total surveillance or global DNA law enforcement database would solve many murders and prevent wrongful convictions. However, it would also give many opportunities for framing convenient suspects and "encouraging" confessions.

I am afraid it could cause wrongful convictions as well. Let's say there is a 1 in a million chance of a false positive, if you have an enormous database there is a large probability of a false positive even though your individual risk is low. As far as I understand DNA evidence is often damaged or incomplete, meaning this could be a serious risk.