Preserving Evidence After an Accident

Evidence disappears fast after an accident. Skid marks fade in days, surveillance footage gets overwritten in hours, vehicles are repaired or crushed within weeks, and memories become unreliable within months. The strength of your Michigan personal injury claim depends largely on the evidence you preserve in the critical days and weeks following your accident. Once evidence is lost, it cannot be recreated, and your case may suffer irreparable harm. Understanding what evidence exists, where it is, and how quickly it can disappear is essential to protecting your right to full compensation.

Spoliation Letters to At-Fault Parties

A spoliation letter, also called a preservation demand or litigation hold notice, is a formal written notification to the at-fault party and their insurance company demanding that they preserve all evidence related to the accident. Once a party receives a spoliation letter, they have a legal obligation to prevent the destruction of relevant evidence, and failure to do so can result in severe court sanctions.

Your attorney should send spoliation letters immediately after you retain them, directing the at-fault party and their insurer to preserve:

• The at-fault vehicle in its post-accident condition, including all damage
• The vehicle's event data recorder (black box) and all stored data
• Any dashcam, backup camera, or internal camera footage
• Cell phone records showing call, text, and app usage at the time of the accident
• GPS and navigation system data
• Employment records, dispatch logs, and hours-of-service logs for commercial drivers
• Vehicle maintenance and inspection records
• Insurance policy documents and prior claims history

Under Michigan's spoliation doctrine, if a party destroys evidence after receiving a preservation demand, the court may instruct the jury to presume that the destroyed evidence was unfavorable to the destroying party. In cases of egregious or intentional spoliation, Michigan courts have imposed sanctions including default judgment, case dismissal, or striking of defenses.

Preservation Demands to Businesses

If your accident occurred near businesses with exterior surveillance cameras, time is critical. Most commercial surveillance systems operate on a loop, overwriting footage every 7 to 30 days depending on the system's storage capacity. Once overwritten, the footage is permanently lost.

Your attorney should identify every business within visual range of the accident scene and send written preservation demands within 24 to 48 hours. These letters should:

1. Identify the date, time, and location of the accident
2. Request immediate preservation of all surveillance footage from the relevant timeframe
3. Specify that the footage should not be overwritten, deleted, or altered
4. Warn that destruction after notice may constitute spoliation with legal consequences
5. Provide contact information for arranging production of the footage

Businesses that receive preservation demands are generally cooperative, but some may require a formal subpoena before releasing footage. The key is getting the preservation demand in their hands before the footage is automatically overwritten by normal system operation. Even a cooperating business cannot produce footage that no longer exists.

Vehicle Hold Requests

One of the most common mistakes accident victims make is allowing their insurance company to declare their vehicle a total loss and send it to a salvage yard where it is crushed or stripped for parts. Your damaged vehicle is a critical piece of evidence that tells the story of the collision's severity, direction of impact, and the forces your body experienced.

Why vehicle preservation matters:

• Crush damage documents force of impact: An accident reconstruction expert can calculate collision speeds by measuring vehicle crush depth and deformation patterns
• The event data recorder is inside the vehicle: EDR data can only be downloaded from the vehicle's onboard computer; once the car is crushed, this data is lost forever
• Mechanical defects may be evident: If a brake failure, tire blowout, or steering malfunction contributed to the accident, the physical evidence exists in the vehicle
• Seatbelt and airbag evidence: Whether the seatbelt pretensioner fired, whether airbags deployed properly, and the condition of safety systems are all preserved in the vehicle

Immediately inform your insurance company in writing that you are placing a hold on your vehicle and that it may not be moved, repaired, sold to salvage, or destroyed without your written consent. If the at-fault driver's vehicle is also evidence, your attorney should include their vehicle in the spoliation letter sent to their insurer. Storage fees may accrue, but the cost of storage is insignificant compared to the evidentiary value of the vehicle in a serious injury case.

Medical Records Preservation

Your medical records form the backbone of your injury claim. Under Michigan's no-fault system, your PIP benefits under MCL 500.3107 cover reasonable and necessary medical treatment, and your third-party claim under MCL 500.3135 requires proof of a serious impairment. Both depend on comprehensive, well-documented medical records.

Steps to ensure your medical records are preserved and complete:

• Report all symptoms to every provider at every visit. If you do not mention a symptom, it will not appear in the record. Insurance companies argue that unreported symptoms did not exist.
• Keep copies of all medical documentation. Request copies of records from emergency rooms, urgent care facilities, primary care physicians, specialists, and therapists.
• Preserve imaging studies. X-rays, MRIs, and CT scans should be obtained on disc or through patient portals. Imaging facilities may not retain images indefinitely.
• Document pre-existing conditions. Obtain records from before the accident to establish your baseline condition and demonstrate how the accident worsened any pre-existing issues.
• Maintain a symptom journal. Daily notes about pain levels, limitations, and how injuries affect your routine create a contemporaneous record that supplements formal medical documentation.

Under Michigan law, healthcare providers must retain medical records for a minimum of seven years, but certain records may be stored off-site or in formats that take time to retrieve. Early collection ensures nothing is lost to administrative transitions, practice closures, or records management changes.

Electronic Data: Black Box and Cell Phone Records

Modern vehicles contain sophisticated electronic systems that record data before, during, and after collisions. The event data recorder (EDR), commonly called the black box, captures critical information including:

• Vehicle speed in the seconds before impact
• Brake application timing and force
• Throttle position and engine RPM
• Steering wheel angle
• Seatbelt status for each occupant
• Airbag deployment timing
• Delta-V (change in velocity during impact)

EDR data is stored in the vehicle's airbag control module. While the data may survive a crash, it can be overwritten by subsequent ignition cycles or lost if the vehicle is repaired or destroyed. Downloading EDR data requires specialized equipment such as the Bosch CDR (Crash Data Retrieval) tool, and must be performed before the vehicle is released for repair or salvage.

Cell phone records are equally critical, particularly when distracted driving is suspected. Your attorney can subpoena the at-fault driver's cell phone carrier records to determine whether they were on a call, sending texts, or using data at the time of the crash. Carriers typically retain call detail records for 12 to 24 months, but preservation demands should be sent early to prevent routine deletion. App usage data, GPS location history, and even social media posting times can establish that a driver was distracted at the moment of impact.

Time-Sensitive Evidence That Disappears

Some evidence has an extremely short preservation window and will be lost without immediate action:

• Skid marks and road evidence: Rain, traffic, and road maintenance can eliminate skid marks, fluid stains, and debris within days. Photograph immediately.
• Weather and road conditions: Document conditions at the scene through photographs and obtain official weather data from the National Weather Service for the date and time of the accident.
• Traffic signal data: Signal timing and phasing records may only be available for a limited period. Request preservation from the municipality immediately.
• 911 recordings and dispatch records: These recordings capture real-time accounts of the accident but may be overwritten or archived after a set period.
• Witness memories: Human memory degrades rapidly. Statements taken within hours are far more reliable than those taken weeks or months later.
• Physical injuries: Bruising, swelling, lacerations, and other visible injuries heal over time. Photograph all visible injuries daily until they resolve.
• Scene conditions: Construction zones, temporary signage, obstructed views, and road defects may be corrected or changed shortly after an accident.

Michigan Spoliation Doctrine Consequences

Michigan recognizes both a common-law duty to preserve evidence and the court's inherent power to sanction parties who destroy relevant evidence. The Michigan Court of Appeals has established that spoliation sanctions are appropriate when a party had a duty to preserve evidence, the evidence was destroyed, and the destruction was intentional or the result of gross negligence.

Available sanctions for spoliation in Michigan include:

• Adverse inference instruction: The jury is told to presume the destroyed evidence was unfavorable to the party who destroyed it
• Preclusion of evidence: The spoliating party may be prohibited from presenting evidence or arguments on the topic the destroyed evidence addressed
• Default judgment or dismissal: In extreme cases of intentional destruction, the court may enter judgment against the spoliating party
• Independent tort claim: Michigan recognizes an independent cause of action for intentional spoliation of evidence in certain circumstances

The strength of spoliation sanctions depends on demonstrating that the destroying party was on notice of potential litigation when the evidence was destroyed. This is why your attorney sends formal preservation demands immediately. A written preservation letter, sent via certified mail with return receipt, creates an irrefutable record that the party was on notice of their preservation obligations. Any subsequent destruction is presumed intentional or grossly negligent, maximizing the available sanctions.

Do not wait to contact an attorney after a serious accident. Every day that passes is a day that evidence may disappear permanently. An experienced personal injury attorney knows exactly what evidence exists, where to find it, and how to preserve it before it is lost. The first 48 to 72 hours after an accident are the most critical window for evidence preservation, and early legal representation ensures nothing falls through the cracks.