What Is Destruction of Evidence?

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  • Written By: Mary McMahon
  • Edited By: Nancy Fann-Im
  • Last Modified Date: 25 January 2020
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Destruction of evidence is the loss, complete destruction, or spoilage of material that could provide evidence in a case. There is a duty to preserve evidence for all parties to a case, and destruction is often viewed prejudicially, as the court assumes that the only reason to destroy evidence is a belief that it could be incriminating or exculpatory, depending on which party destroys it. There may be legal penalties for destruction of evidence.

Evidence can be destroyed in a variety of situations. Sometimes a party with custody of the evidence behaves negligently and loses it or exposes it to risks. For example, a medical examiner may fail to collect DNA evidence properly, making it impossible to test later. Likewise, a police officer might fail to observe chain of evidence procedures by leaving evidence unsecured on the seat of his vehicle, leading to loss of the evidence through theft.

In other cases, destruction of evidence may appear willful. Shredding documents is an example, as are attempts to deliberately ruin evidence like burning it or hiding it. This wanton destruction of evidence tends to be regarded with extreme suspicion. The court may rule in favor of the opposing party if the destruction of evidence comes to light, arguing that it might have played a critical role in the case and now cannot be used because of the destruction.


It is important to be aware that destruction of evidence is not always viewed negatively by the court. Sometimes it is necessary to subject evidence to destructive testing in order to uncover more information. Ideally both parties consent to this, and a judge rules that the testing should proceed. An example is DNA evidence; if there is only a small sample, the testing will ruin it and make it impossible to repeat it at another facility or in the future. Evidence analysts may be forced to make a decision between destroying evidence to collect vital information, or saving it and not being able to draw conclusions from testing.

Evidence is also destroyed routinely after a set period of time in closed cases. Once a court hears a matter and reaches a decision, the evidence is retained long enough to make it available for appeals, and then the party in charge of storing it has the right to destroy it. This frees up space for storage. Courts may decide to keep evidence with historical or legal interest beyond this mandatory holding period.


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Post 3

Sometimes evidence isn't "destroyed" but manipulated and changed. I saw a foreign film the other day, a court drama where one party bribed a police officer to change evidence. The police reports said that a car was responsible for the accident, but they changed the car to a truck. So this way, it could not be proven that the defendant was responsible for the accident.

Post 2

@stoneMason-- Yes, there are different types of evidence destruction, some of which occurs due to negligence of those on duty and some out of necessity. When evidence is destroyed or lost due to negligence, then action can be taken against those who were responsible, regardless of whether there was ill intention or not. Obviously, when evidence is destroyed during testing out of necessity, no one is responsible for it. It was a decision that had to be taken.

Evidence destroyed by a party to a legal dispute is whole different issue. This is not something that can be ignored because it is a sign that the evidence was harmful to that party's legal standing. In a way, it shows

who was guilty. There may be exceptions to this. For example, if someone simply forgets to save a receipt proving that he was somewhere at a certain time of the day, that's not really done intentionally. A court might not take that very seriously.

But if evidence was found and acknowledged and suddenly disappeared or got destroyed, then that's a sign that it was done intentionally.

Post 1

I thought that evidence is always destroyed or spoiled by a party to a legal dispute. It never occurred to me that evidence gets destroyed accidentally or intentionally during evidence collection and forensic testing. Thanks for the information.

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