Evidence to Preserve After a Fatal Vehicle Crash in Arizona

Updated September 14, 2026

Losing someone in a crash leaves a family facing grief and urgent practical questions. Fatal car accident evidence preservation in Arizona means identifying what may be lost, who holds it and how to request it lawfully. You do not need every answer before asking that relevant evidence be saved.

This guide explains scene photographs, vehicles, electronic records, witnesses and medical documents. It also separates a preservation request from a legal right to obtain records. For help assessing the next steps after a fatal crash, call (602) 345-1818 for a free consultation.

Why Evidence Preservation Matters After a Fatal Crash

A wrongful death claim requires evidence connecting a wrongful act to the death under A.R.S. § 12-611. Other questions include who may bring the claim and the losses the law recognizes. Evidence about the collision and evidence about the family’s losses serve different purposes.

Fault can affect recovery. A.R.S. § 12-2505 generally reduces damages according to the injured person’s share of fault, subject to statutory exceptions. Preserving reliable information helps evaluate a fault allegation, whether it comes from a driver, an insurer or another source. An allegation is not a finding.

Photographs, vehicle data, recordings and witness accounts may corroborate or contradict one another. None is automatically conclusive. For example, the absence of visible skid marks does not by itself prove that a driver never braked. A useful investigation records the evidence and explains its limits.

Start with material at risk of change or deletion. A prompt request may help protect it while the family and an attorney assess the claim. Preserve information that could be unfavorable too; selective deletion creates additional problems.

Who Has Authority to Preserve Evidence

A.R.S. § 12-612 identifies who may bring an Arizona wrongful death action: a surviving spouse, child, parent or guardian, or the deceased person’s personal representative. The action benefits the statutory survivors identified in the law, or the estate if none survive. Bringing the action and receiving a share are distinct questions; statutory disqualifications also matter.

Anyone can ask a holder to save relevant material. A request does not itself compel compliance or authorize entry onto private property, a vehicle download or disclosure of protected records. Subpoenas and court orders have their own procedural requirements. The person making the request should accurately identify their relationship and authority.

Probate appointment is not a prerequisite to sending preservation requests. A personal representative may be needed for an estate claim or certain record access, while a qualifying statutory plaintiff can bring the wrongful death action without first opening probate. Determine which authority is actually needed instead of delaying all evidence work.

Scene Evidence: What Disappears First

Traffic, cleanup, weather and repairs can change a crash scene. Early photographs can preserve conditions that a later visit cannot reproduce. Safety comes first: family members should not enter traffic, restricted property or an active investigation to obtain them.

The NHTSA Special Crash Investigations program uses detailed scene, vehicle and occupant information in selected investigations. Depending on the disputed facts, useful scene information may include:

• Wide views showing approach lanes, travel directions and fixed reference points.
• Tire marks, pavement damage and debris, with scale and location documented when safely possible.
• Lane widths, sight obstructions, signs and traffic-control equipment.
• Lighting, weather and road-surface conditions, distinguished from conditions observed on a later visit.
• Vehicle positions before movement, if documented by witnesses or responders.
• Signal timing or maintenance records where they exist and are relevant.

Keep original image files rather than only screenshots or edited copies. Record who took each photograph and when. A qualified reconstructionist can assess whether measurements or a later inspection would help. The need for an expert depends on the available evidence and the question, not just the severity of the crash.

Vehicle Evidence: EDR Data, Crush Analysis, and Salvage Disposal

Identify where each vehicle is stored, who owns it and who can authorize an inspection. Ask about repairs, sale, storage charges and disposal plans. There is no universal rule that all totaled vehicles are destroyed after 30 days. A sale may change access without immediately destroying evidence.

An event data recorder, or EDR, stores specified technical information around a qualifying event. NHTSA explains EDR data as vehicle and occupant information for a short period around a crash. Equipment, recorded fields and availability vary. Do not assume every vehicle recorded speed, braking, steering and restraint information.

The vehicle evidence categories that need to be preserved include:

• Available EDR or other relevant module data, retrieved with lawful authority and a suitable method.
• Vehicle damage measurements and photographs before repair or component removal.
• Tires, brakes, steering components and lighting when a defect or condition is relevant.
• Restraint and airbag evidence supported by inspection or the actual recording system.
• Repair history and prior damage needed to interpret current findings.
• A documented inspection and storage arrangement with the actual custodian.

The vehicle owner, tow facility, insurer or another custodian may have a role. Do not assume the opposing insurer owns or controls the vehicle. A preservation request is a starting point; seek confirmation and address access and cost. An EDR download still requires interpretation, including whether the stored event is the crash being investigated.

Electronic Evidence: Find the Holder and Retention Policy

Digital evidence can be overwritten, deleted or inaccessible. Retention depends on the system, settings, subscription and record type. Identify actual sources promptly rather than relying on a general seven-day or 30-day estimate.

Categories to preserve:

• Relevant call logs or other phone records, subject to privacy and lawful access requirements.
• Navigation, messaging or other app information that actually exists on a device or service.
• Supported vehicle telematics or infotainment records.
• Relevant recordings held by a business, homeowner, fleet or dashcam owner.
• Agency records or recordings, after confirming that the particular system creates and retains them.

A camera visible on a pole is not proof of an archived recording. ADOT’s published camera FAQ states that its traffic-camera footage is not recorded. That guidance does not establish how every municipal, private or specialized system works. Confirm the specific camera and holder; a live traffic feed alone does not establish that crash footage exists.

Ask for preservation of a reasonable period before and after the collision, with location, date and an approximate time. Save the reply and follow up about export. A civil subpoena does not make deleted data reappear, and it does not automatically overcome statutory restrictions on communications content. Do not log into another person’s account without authority.

Witness Evidence: Statements, 911 Recordings, and CAD Logs

A witness may describe events outside the camera view or before impact. Obtain contact information and an accurate account promptly when the witness is willing. Ask open questions and separate what the person observed from what someone else told them.

What needs to happen fast:

• The witness’s name, reliable contact details and location when observing the crash.
• A dated account identifying firsthand observations and uncertainty.
• Relevant 911 recordings requested from the agency that received the calls.
• Computer-aided dispatch records, which may document reported events and response activity.

A 911 recording can preserve an early description, but it is not automatically admissible or accurate in every detail. Authentication and applicable evidence rules still matter. Dispatch and camera clocks may differ, so compare their time references before constructing a precise sequence.

Law Enforcement Records: Crash Report, Body-Cam, Reconstruction

A.R.S. § 28-667 requires an investigating officer or public employee to complete a written report for specified crashes, including those involving death. Ask which additional records were created; not every investigation produces every item below.

• The crash report and supplements.
• Investigator narratives and witness interviews.
• Scene diagrams, photographs and measurements.
• Available body-camera or patrol-camera recordings.
• A reconstruction report if one was prepared.
• Records identifying vehicles, evidence collected and relevant custodians.

Provide the report number, location, date and names when requesting agency records. A public-records request may be appropriate; some material may be withheld, redacted or delayed for legal reasons. Document what was requested and what was received. The report is useful evidence, but its fault assessment does not bind a civil factfinder.

Medical Examiner, EMS and Hospital Records

For a death investigated by the Maricopa County Office of the Medical Examiner, ask which reports exist and whether they are complete. The county’s public-records request page lists report types and explains that not every type is prepared for every investigation.

• The medical examiner report and any autopsy findings that were prepared.
• Available toxicology and specialized examination reports.
• EMS records from the responding provider.
• Hospital records, imaging and treatment information from the treating facility.
• Death certification and other relevant records identifying the cause and timing of death.

EMS and hospital records are separate sources, not items guaranteed to be inside the medical examiner file. Medical findings may help connect injuries to the collision. A toxicology result also requires appropriate interpretation; its presence alone does not establish impairment, fault or the cause of the crash.

The county makes completed reports available through its public request process; probate appointment is not a universal condition. Protected medical records follow different rules. HHS guidance on deceased individuals’ health information recognizes access rights for a legally authorized personal representative and certain limited disclosures to people involved in care. Being a relative does not automatically grant unrestricted access to all records.

Commercial Carrier Records for Truck-Involved Fatalities

A commercial truck may create additional records. Federal requirements depend on the vehicle, driver, operation and regulation involved. Identify the actual employer, carrier, equipment owner and relevant record custodians before sending requests.

• Driver qualification and training records relevant to the disputed conduct.
• Hours-of-service records, ELD information and supporting documents.
• Dispatch communications, route information and load documents.
• Maintenance, inspection and repair records.
• Required post-crash drug or alcohol testing records, if the driver and occurrence fall within the applicable rules.
• Agency inspection reports and photographs that were actually created.

FMCSA’s post-accident testing guidance explains testing for covered surviving drivers after a fatality, with regulatory conditions and timing requirements. Its hours-of-service retention guidance requires applicable duty-status records and supporting documents to be retained for at least six months. Different records have different minimum periods. A minimum retention rule is not permission to destroy evidence despite a separate preservation duty.

Preservation Letters and Spoliation

A preservation letter identifies relevant evidence and asks the holder to retain it. A party’s legal duties depend on the circumstances, including anticipated litigation. The letter does not freeze a device, compel production or automatically create a duty for an unrelated holder. Lips v. Scottsdale Healthcare Corp., 224 Ariz. 266 (2010) rejects a duty arising merely from a unilateral preservation request in the circumstances addressed there.

In a fatal crash, preservation letters typically go to:

• The involved driver and the vehicle’s actual owner or custodian.
• A potentially responsible employer or motor carrier and relevant record holders.
• An insurer with relevant information or control of material.
• Businesses, homeowners or fleet operators that may have relevant video.
• Other identifiable custodians, with an appropriate request and lawful process for protected records.

Ask for written confirmation and clarify what was saved, by whom and in what format. If evidence is at immediate risk, discuss whether appropriate court relief is available. Souza v. Fred Carries Contracts, Inc., 191 Ariz. 247 (App. 1997) treats remedies for evidence loss according to the circumstances. Destruction does not automatically establish liability or entitle a claimant to a particular sanction.

Parallel Investigations

More than one investigation may occur. They can overlap without having identical responsibilities or access:

• Law enforcement may investigate traffic offenses or criminal conduct while collecting useful collision evidence.
• A licensing agency may consider administrative issues where applicable.
• Insurers may investigate liability, damages or coverage; a special investigations unit is not involved in every claim.
• Civil counsel may investigate the wrongful death claim, including family losses and available recovery sources.

Ask what each agency has preserved and how to request it. Do not assume police collected nothing beyond the report, or that they secured everything a civil claim needs. Criminal proceedings and civil deadlines differ. Waiting for a charging decision does not automatically extend the time to bring a civil action.

How Evidence Protects Recovery Under Arizona Comparative Fault

Arizona generally uses comparative fault under A.R.S. § 12-2505. The law includes an exception for a claimant’s intentional, wilful or wanton conduct. A.R.S. § 12-2506 also addresses allocating responsibility among defendants and nonparties, generally limiting each defendant to its share subject to statutory exceptions.

Evidence can test claims about speed, right of way, distraction or visibility. A reconstruction opinion should explain its assumptions, source material and uncertainty. Missing one source does not make a claim impossible, and obtaining a video does not guarantee a favorable allocation.

For a simple hypothetical, a 20% reduction applied to $100,000 in proved damages leaves $80,000 before other adjustments. That is arithmetic, not a settlement estimate or a firm result. Available insurance, collectible assets and other legal issues can affect what is ultimately recovered.

Deadlines That Shorten Your Evidence Window

Preserving evidence and meeting legal deadlines are different tasks. A records request, insurer claim or preservation letter does not substitute for filing the required legal papers.

For an ordinary wrongful death claim against a private defendant, A.R.S. § 12-542 provides a two-year period and treats the claim as accruing at death. The death date can differ from the crash date. Exceptions and the identity of each claimant require individual review.

A claim against a public entity or employee generally requires a proper notice within 180 days after accrual under A.R.S. § 12-821.01. It also generally requires a lawsuit within one year after accrual under A.R.S. § 12-821. These are separate requirements. A notice needs the required facts, settlement amount and supporting basis, delivered to the proper recipient. Identify accrual and any exceptions promptly.

Evidence can disappear before any filing deadline, but there is no universal first-30-days expiration for all evidence. Prioritize actual risks: a scheduled vehicle disposal, an identified video overwrite or a witness becoming difficult to reach. Keep a written task list with the holder, request date, response and next step.

Records That Document the Family’s Losses

Collision evidence addresses responsibility. A.R.S. § 12-613 separately directs attention to the injury the death caused the eligible survivors. Gather records that explain actual financial support, household services and the relationship, without turning the process into a demand for a particular dollar amount.

• Employment, income and benefits records relevant to lost financial support.
• Receipts for funeral and burial expenses and information identifying who paid them.
• A description of household tasks and care the deceased person provided, with available supporting records.
• Information about each eligible survivor’s relationship and losses, kept distinct rather than assuming equal shares.

A wrongful death claim differs from an estate’s survival claim. A.R.S. § 14-3110 allows specified causes of action to survive through a personal representative, but excludes damages for the deceased injured person’s pain and suffering. Counsel should identify the proper claim and recipient for each loss and avoid duplicate recovery. Keep medical bills and payment records for that analysis, even when the correct legal category is not yet clear.

Frequently Asked Questions

Do I need to open probate before I can preserve evidence?

No. You can ask a holder to preserve relevant evidence before probate is opened. A request does not compel access or production. A personal representative may be needed for an estate claim or particular records, while A.R.S. § 12-612 identifies who may bring a wrongful death action. Assess the required authority for each task.

How fast do I need to send preservation letters after a fatal crash?

Promptly after identifying relevant material at risk. Retention varies, so ask the actual holder about planned deletion, repair or disposal. A delivered letter does not guarantee preservation or create every legal duty. Obtain confirmation and consider appropriate further action when evidence is at immediate risk.

Can I rely on the police investigation to gather what I need?

Police may collect substantial relevant evidence, including video and vehicle information. Ask what exists and request it through the appropriate process. The civil claim may require additional evidence, especially about family losses. A police investigation or pending criminal proceeding does not automatically extend civil deadlines.

What is Event Data Recorder (EDR) data and why does it matter?

An EDR stores certain technical information around a qualifying vehicle event. The fields and availability depend on the vehicle and system. Properly retrieved data may help answer a disputed question, but it needs interpretation and lawful access. It is not automatically a complete or conclusive account of the collision.

What if the fatal crash involved a government vehicle or a road defect?

A claim against a public entity or employee generally has both a 180-day notice requirement and a separate one-year lawsuit deadline after accrual under A.R.S. §§ 12-821.01 and 12-821. Identify the responsible party, accrual and exceptions promptly. A road defect does not automatically make every defendant a public entity.

How does fault allocation work if my loved one is no longer here to explain what happened?

The factfinder can consider admissible photographs, records, recordings, witness accounts and appropriate expert testimony. Arizona comparative-fault rules may reduce recovery, subject to statutory exceptions. The absence of the deceased person’s testimony does not automatically establish fault or defeat the claim.

Talk to a Phoenix Wrongful Death Attorney

Bring the crash date and location, agency report number, vehicle locations and any immediate storage or deletion deadline. You do not need a completed investigation before asking for an initial review.

We can discuss potential claims, the authority needed to obtain records and the evidence questions that deserve attention. Any proposed expert work, costs and representation terms should be explained before you decide how to proceed.

Call (602) 345-1818 for a free consultation with Impact Legal Car Accident Attorneys. Intake is available 24/7. A family member can make the initial call and explain what is known.

By Jared J. Pehrson | Impact Legal Car Accident Attorneys