I am going to say, that you make a good point.
However, in every case I know of, where someone was convicted and then overturned by DNA evidence, IT WAS A MINORITY.
SO justice in America sucks for minorities. And many minorities will be asked to sign a confession just to get a reduced sentence- like being offered a sentence of life in prison instead of the death penalty- for example.
And true, State provided lawyers are not good lawyers always. And who knows if they are doing the dirty work for some Racist corrupted Judge or DA.
SO, let me reiterate- WHEN DNA EVIDENCE IS USED TO PROVE THE GUILT, or there is a credible witness, THOSE MURDERERS SHOULD BE IMMEDIATELY EXECUTED.
If the evidence is circumstantial, PROBABLY SHOULD NOT BE IMMEDIATELY EXECUTED.