> If we had a DNA database we could quickly clear people as innocent.
Only when you have a sample to compare it to that definitively came from the perpetrator (not just “was found at the scene and can indicate that whoever it came from was present”.)
Only when you have a sample to compare it to that definitively came from the perpetrator (not just “was found at the scene and can indicate that whoever it came from was present”.)
That's actually not all that common.