One should remember that since the advent of DNA testing, a disturbing fact that has emerged is that in a distressing number of cases, an innocent person was been tried and found guilty "beyond a shadow of a doubt," and either executed or confined to a prison cell for a large portion of their life, only to be exonerated as a result of the DNA testing.

Now, DNA testing is (or certainly should be) part of the evidence in a trial.

Often these miscarriages of justice came as the result of errors in eye-witness identification, frequently combine with outrage at the nature of the crime and an urge for vengeance rather than justice.

Don Firth