Evidence from the crime is destroyed
No coherent evidence preservation system exists in Louisiana.
In many cases, biological evidence which could prove innocence or confirm guilt is destroyed or lost soon after the person is sent to prison. There are cases in New Orleans in which evidence has been lost less than seven years after the person was convicted and some cases where evidence has been preserved for 30 years. Every parish and every agency has a different system for storing, preserving and destroying evidence from crime scenes.
In over 50% of the cases in which IPNO has looked for evidence to try to do DNA testing on, the evidence has since been lost or destroyed.
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