Some injury cases are won or lost by evidence that no longer exists. The car that caused the crash is scrapped before anyone downloads its data; the surveillance video of the fall is taped over within days; the defective product is thrown away; the maintenance logs that would show a known hazard quietly disappear. When the proof that would have decided a case is gone, the party who lost or destroyed it often shrugs and says the injured person simply cannot meet their burden. That is exactly backward, and Massachusetts law has a name for what happened: spoliation of evidence.
Spoliation is the loss, destruction, or alteration of evidence that a party had a duty to preserve, and it carries real consequences. A party that had reason to know evidence would matter to a case and failed to keep it does not get to benefit from the gap it created. Instead, the court can impose sanctions designed to level the field, from telling the jury it may assume the missing evidence would have been unfavorable, to barring the responsible party from using related evidence of its own, to more severe remedies in extreme cases. The doctrine exists precisely so that destroying proof is not a winning strategy.
Understanding spoliation matters to anyone with a serious injury claim, both because a defendant’s destruction of evidence can strengthen a case and because an injured person has preservation obligations of their own. What follows is how Massachusetts treats spoliation: what it is, when the duty to preserve arises, the sanctions a court can impose, and why acting immediately to lock down the evidence is one of the most important things an injured person can do. This is general information, not advice about a specific case.
What spoliation is
The concept is simple, but a few features of how Massachusetts handles it are worth understanding up front.
Destroying or losing the proof
Spoliation covers any failure to preserve evidence that a party had a duty to keep, whether the evidence was deliberately destroyed, carelessly lost, altered, or simply allowed to disappear through neglect. It can be physical, like a vehicle, a product, or a broken piece of equipment, or electronic, like surveillance video, data from a vehicle, emails, or maintenance records. What matters is not the form of the evidence but that it was relevant to a potential claim and that a party who should have preserved it did not. The destruction need not be malicious to count; even an innocent failure to keep important evidence can be spoliation and can carry consequences, because the harm to the case is the same regardless of intent.
That said, whether the loss was deliberate or merely careless does shape how severely a court will respond, which is why the circumstances of the destruction are examined closely.
It is not a separate lawsuit in Massachusetts
An important feature of Massachusetts law is that spoliation is generally not an independent tort you sue over on its own. Unlike a few other states, Massachusetts does not let an injured person bring a separate claim for money damages simply because evidence was destroyed. Instead, spoliation is addressed within the underlying case through sanctions and remedies aimed at curing the unfairness the loss created. This means the response to destroyed evidence is not a new lawsuit but a request to the court to even things out in the existing one, by penalizing the responsible party and preventing it from profiting from the gap. Knowing this shapes how the issue is raised and pursued.
Intentional versus negligent spoliation
The state of mind behind the loss matters to the remedy, even though it is not required to establish spoliation. Deliberate destruction of evidence, especially to keep it from an opponent, tends to draw the harshest sanctions, because it reflects an awareness that the evidence was damaging. Negligent loss, where a party simply failed to preserve what it should have, can still be sanctioned but may draw a more measured response. Courts calibrate the remedy to the culpability and to the harm caused, so the same missing video might lead to a strong adverse inference where it was intentionally erased and a lesser remedy where it was lost through carelessness. Either way, the party that failed in its duty does not escape consequences.
Courts also consider whether the party had a routine practice of destroying such records and whether it suspended that practice once a claim became foreseeable, as it should have.
The duty to preserve evidence
Everything in a spoliation analysis starts with whether a duty to preserve existed and when it began.
When the duty arises
The duty to preserve evidence arises when a party knows, or reasonably should know, that the evidence might be relevant to a possible legal claim. It does not wait for a lawsuit to be filed. Once litigation is reasonably foreseeable — after a serious injury, a notice of claim, a demand letter, or circumstances that make a claim likely — the party in control of relevant evidence is obligated to preserve it. This is why the timing of a spoliation problem is so important: a defendant that destroyed a vehicle or erased a video after it had reason to anticipate a claim breached its duty, while the same act before any claim was foreseeable may be treated differently. Pinpointing when the duty attached is often the pivotal question.
A serious injury with an obvious cause frequently puts a careful party on notice long before any letter arrives, so the duty can begin earlier than a defendant would like to admit.
What must be preserved
The duty extends to evidence the party knows or should know is relevant to the anticipated claim, which in an injury case can include a great deal. The instrumentality that caused the harm, the scene, physical objects and products, vehicles and their data, surveillance footage, photographs, incident reports, inspection and maintenance records, and relevant electronic communications may all fall within it. A party cannot simply preserve what helps it and discard the rest; the obligation covers the material that bears on the claim, including evidence that may be unfavorable to the party holding it. Defining the scope of what should have been kept is central to showing that a particular loss was a breach of the duty rather than routine disposal.
The duty runs both ways
Preservation is not only the defendant’s obligation; an injured person can have the same duty. Once someone anticipates bringing a claim, evidence within their control — the product that hurt them, their damaged vehicle, their own device or records, the clothing or equipment involved — must be preserved as well. A plaintiff who discards or alters key evidence can face the same kinds of sanctions a defendant would, including having their own evidence excluded or facing an adverse inference. This cuts against the instinct to clean up, repair, or dispose of things after an injury, and it is one of the most important and least understood aspects of the doctrine for injured people to grasp early.
When a defendant destroys the evidence
In practice, the most consequential spoliation is usually a defendant’s loss of the very proof an injured person needs.
The vehicle, the product, the scene
Physical evidence is often at the heart of the case and often the first thing to vanish. After a serious crash, the vehicles carry crucial data and physical proof, yet they can be repaired, sold, or scrapped within weeks. In a product liability case, the defective item itself is the essential evidence, and a manufacturer or seller that discards or alters it destroys the plaintiff’s ability to prove the defect. A dangerous condition at a scene can be repaired away before it is documented. When a defendant controls this physical evidence and lets it disappear after a claim is foreseeable, the loss is spoliation, and it can shift the balance of the case decisively.
Surveillance video and electronic records
Electronic evidence is both powerful and fragile. Surveillance video of a fall, a crash, or an assault can prove exactly what happened, but many systems overwrite footage within days unless someone preserves it, and a business that fails to save the relevant video after an incident it knew about has lost critical proof. The same is true of vehicle event-data recorders, a truck’s electronic logs, access and swipe records, and internal communications, all of which can be overwritten or deleted on a routine schedule. Because this evidence is so perishable and so revealing, a defendant’s failure to preserve it after a claim became foreseeable is among the most common and most damaging forms of spoliation.
Standard retention settings that quietly overwrite footage on a short cycle are no excuse once an incident is known, because at that point the duty to intervene and save the recording has already arisen.
Maintenance and inspection records
Paper and digital records frequently hold the key to a defendant’s knowledge of a hazard. Maintenance logs, inspection reports, prior complaints, incident reports, and repair histories can show that a defendant knew about a dangerous condition and failed to fix it, which is often the crux of liability. These records are supposed to be kept, and their convenient disappearance after an injury is itself telling. When a defendant cannot produce the very records that would establish its notice of a hazard, and had a duty to preserve them, the loss supports a spoliation remedy and can allow a jury to conclude that the missing records would have shown exactly what the defendant does not want revealed.
The sanctions for spoliation
Massachusetts courts have a range of tools to remedy the unfairness that destroyed evidence creates.
The adverse inference
The most familiar remedy is the adverse inference. Where a party has lost or destroyed evidence it had a duty to preserve, the court may permit the jury to infer that the missing evidence would have been unfavorable to that party. In practice this can be powerful: instead of the gap counting against the injured person who never had the evidence, the jury is told it may assume the destroyed video, record, or object would have helped the other side. The adverse inference turns the spoliator’s own destruction against it, and it reflects the common-sense intuition that a party does not usually destroy evidence that would have helped its case.
Excluding the spoliator’s evidence
Another common sanction bars the party responsible for the loss from using evidence related to what was destroyed. If a defendant destroyed a product before the plaintiff’s expert could examine it, a court may prevent the defendant’s own expert from testifying about the product’s condition, since allowing it would reward the party that deprived the other side of the same opportunity. This kind of exclusion prevents a spoliator from having it both ways — destroying the evidence and then relying on its own version of what that evidence would have shown. Tailoring the exclusion to neutralize the unfair advantage the destruction created is a frequent and effective remedy.
Other remedies and case-ending sanctions
In more serious cases, courts have additional and stronger tools. They can issue jury instructions about the spoliation, shift certain burdens, exclude broader categories of evidence, or, in extreme cases of willful destruction that has crippled the other side’s ability to prove or defend a claim, enter sanctions that effectively decide an issue or even the case. The severity is matched to the culpability and the prejudice: the more deliberate the destruction and the greater the harm to the case, the harsher the available remedy. This range ensures that a party cannot calculate that destroying evidence will leave it better off than preserving it, which is the entire point of the doctrine.
Protecting your own evidence
Because the duty runs both ways, an injured person must be as careful with evidence as they hope the other side will be.
The plaintiff’s duty too
It is easy to focus on a defendant’s destruction and forget that an injured person has the same obligation to preserve what they control. The natural impulse after an injury — to repair the car, replace the product, discard the broken item, or clean up — can inadvertently destroy the very evidence the case depends on and expose the injured person to sanctions. A plaintiff who cannot produce the product that hurt them, or who repaired away the proof, hands the defense a spoliation argument to use against them. Recognizing this duty early, and resisting the urge to move on physically before the evidence is documented and preserved, protects the claim from a self-inflicted wound.
Preserving what you control
Preserving evidence means keeping the relevant items exactly as they are and documenting everything. The damaged product, vehicle, clothing, or equipment should be kept and not repaired, altered, or discarded; photographs and video should capture the scene and the injuries; and records, receipts, and communications should be saved. Where an item cannot practically be kept forever, it should at least be thoroughly documented and, ideally, examined before anything changes. The goal is to make sure that when the case is evaluated, the proof still exists in its original condition, both to build the claim and to foreclose any argument that the injured person failed in their own preservation duty.
Keeping a simple written record of where an item is stored and that it has not been altered adds a further layer of protection against any later challenge.
The risk of losing your own case
The consequences of a plaintiff’s spoliation can be severe enough to sink an otherwise strong claim. If an injured person destroys or loses the key evidence, a court may exclude their proof, permit an adverse inference against them, or otherwise handicap the case to the point that it cannot succeed. A meritorious injury claim can be undone not by the facts but by a failure to keep the evidence that would have proven them. This is why preservation is not a technicality but a foundational step, and why understanding the obligation from the very beginning, ideally with guidance, is so important to protecting the claim.
How spoliation shapes a case
Handled well, a spoliation issue can change the trajectory of a case.
Turning a gap into an advantage
When a defendant has destroyed evidence, the injured person’s task is to make sure the gap counts against the party that created it, not against the victim who never had the proof. Properly raised, spoliation converts a missing piece of evidence from a weakness in the plaintiff’s case into an affirmative point against the defendant, through an adverse inference or the exclusion of the defendant’s evidence. The absence of the video or the product becomes a story about a defendant who did not keep what it was supposed to keep. Framing the loss this way, and supporting it with the record, is what turns destroyed evidence into leverage rather than a fatal gap.
The evidence about the evidence
Winning a spoliation argument requires proving what happened to the evidence, so the case often develops a second layer: evidence about the evidence. Records of what existed, retention policies, communications about preservation, the timing of the destruction, and testimony about how and why the evidence was lost all become important. This is where discovery and investigation matter, because establishing that the defendant had the evidence, had a duty to keep it, and failed to do so is what supports a sanction. The story of the missing proof — who had it, when it vanished, and what the party knew — frequently becomes as important as the underlying facts of the injury.
In some cases the defendant’s conduct around the evidence tells the jury more about the strength of the claim than the disputed details of the incident ever could.
Proving the duty and the loss
To obtain a remedy, the injured person generally must show that the party had a duty to preserve the evidence, that the evidence was lost or destroyed, and that its loss caused prejudice. Each element takes proof: that litigation was reasonably foreseeable when the evidence was destroyed, that the material was relevant, and that its absence genuinely handicaps the case. Building this showing is a legal task that benefits from experience with how Massachusetts courts weigh culpability and prejudice in fashioning a sanction. Done well, it not only secures a remedy but reframes the entire case around the defendant’s failure to preserve the truth.
Acting to preserve evidence early
Because evidence disappears fast, the most valuable spoliation work happens at the very beginning of a case.
The preservation letter
One of the first steps in a serious case is a preservation, or spoliation, letter, a formal written demand that puts a potential defendant on notice to preserve specific evidence and warns of the consequences of destroying it. Sent promptly, it removes any doubt that the party knew the evidence mattered, which strengthens a later spoliation argument if the evidence disappears anyway. It identifies the vehicles, video, records, products, and data that must be kept, and it starts the clock on the party’s duty in unmistakable terms. A well-timed preservation letter is often the single most effective tool for keeping crucial evidence from vanishing.
Moving fast before evidence is gone
The reality is that the most important evidence in an injury case is frequently the most perishable. Video is overwritten in days, vehicles are repaired or scrapped in weeks, products are discarded, and records are purged on routine schedules. Every day that passes after an injury is a day in which decisive proof can be lost forever, often innocently and as a matter of routine. Acting quickly — to document the scene, to demand preservation, and to secure the evidence within reach — is what prevents a case from being decided by what no longer exists. Speed is not merely helpful here; it is often determinative.
The first days after an injury, when a person is focused on recovery, are unfortunately the very window in which the most decisive evidence is most likely to slip away for good.
When to call a Boston injury lawyer
Spoliation sits at the intersection of fast-disappearing evidence, a preservation duty that runs both ways, and a body of remedies that must be invoked correctly to do any good — difficult to manage alone and easy to get wrong while recovering from an injury. A lawyer moves immediately to preserve the evidence, sends the preservation demands, secures what the injured person controls, and, where a defendant has destroyed proof, builds and presses the spoliation remedy that turns the loss against the responsible party; this work is handled on contingency, so there is no fee unless there is a recovery. Our Boston personal injury attorneys handle motor-vehicle, trucking, and product injury claims where preserved evidence is decisive, work that sits alongside our coverage of the defense tactics insurers use to shrink a claim, and extends across our practice areas and nearby communities including Quincy and Cambridge. If key evidence in your case has been lost or destroyed, or you are worried it soon will be, a first conversation costs nothing, and you can reach out before more of it disappears.
Reviewed and Approved By
This article was reviewed by Daniel J. Larson, the founding attorney of Larson Law and a Massachusetts-barred personal injury lawyer in Boston. He represents individuals and families harmed by negligence, from motor-vehicle and product injuries to unsafe property and other preventable incidents. Attorney Larson works litigation-first, developing each case through careful investigation, discovery, and expert analysis and preparing it as though it may be tried. Before founding the firm, he defended hospitals, physicians, and other healthcare providers in malpractice litigation at a Boston firm, experience that informs how he anticipates the way insurers and defense counsel evaluate a claim. He is a member of the Massachusetts Bar Association and the Massachusetts Academy of Trial Attorneys.
Frequently asked questions
What is spoliation of evidence?
Spoliation is the loss, destruction, or alteration of evidence that a party had a duty to preserve for a legal claim. It can involve physical evidence like a vehicle or a defective product, or electronic evidence like surveillance video, vehicle data, or maintenance records. The destruction does not have to be deliberate; even careless loss of important evidence can count. In Massachusetts, spoliation is generally addressed within the existing case through sanctions rather than as a separate lawsuit, and those sanctions are designed to cure the unfairness that losing the evidence created, so the party that destroyed proof does not benefit from the gap.
Can I sue someone in Massachusetts for destroying evidence?
Generally not as a separate lawsuit. Unlike some states, Massachusetts does not recognize an independent tort of spoliation that you sue over for money damages on its own. Instead, the destruction of evidence is handled inside the underlying injury case through sanctions — such as an adverse inference or the exclusion of the responsible party’s evidence — aimed at evening out the unfairness. So the remedy is not a new claim but a request to the court in the existing case to penalize the party that failed to preserve the evidence and to keep it from profiting from the loss.
What happens if a defendant destroys the evidence I need?
If the defendant had a duty to preserve the evidence and lost or destroyed it, the court can impose sanctions. The most common is an adverse inference, where the jury may assume the missing evidence would have been unfavorable to the defendant. A court can also bar the defendant from using its own related evidence, give instructions about the destruction, or, in extreme cases of willful destruction, impose severe sanctions that effectively decide an issue. Properly raised, the defendant’s destruction of evidence becomes a point against it rather than a gap that hurts you.
Do I have to preserve evidence too?
Yes. Once you anticipate bringing a claim, you have a duty to preserve evidence within your control, such as the product that injured you, your damaged vehicle, the broken item, or relevant records. If you repair, discard, or alter that evidence, you can face the same kinds of sanctions a defendant would, including exclusion of your proof or an adverse inference against you. This is one of the most important and least understood parts of the doctrine. Resist the urge to clean up, repair, or throw things away after an injury until the evidence has been documented and preserved.
What should I do to protect the evidence in my case?
Act quickly, because the most important evidence is often the most perishable. Keep the damaged product, vehicle, or item exactly as it is; photograph the scene and your injuries; and save records, receipts, and communications. Just as important, get legal advice early so a preservation or spoliation letter can be sent to any potential defendant, formally demanding that it keep specific evidence like video, vehicle data, and maintenance records before those are overwritten or discarded. Video can be gone in days and vehicles in weeks, so moving fast is frequently what keeps a case from being decided by evidence that no longer exists.
Results Disclaimer: Past case results, settlements, and verdicts mentioned on this website do not guarantee or predict a similar outcome in any future case. Every case is unique and depends on its own facts and legal issues.