Question

Many exonerations are not based on dna evidence, but on the discovery that prosecutors had ignored or _______ evidence.​

Answer 1

Many exonerations are not based on DNA evidence, but on the discovery that prosecutors had ignored or TAMPERED evidence. Tampering evidence significantly damages the reputation of the prosecution in this case and since verdicts must be done "beyond reasonable doubt" any doubt will weaken the accusation and might result in a review of the case and subsequently an exoneration.