12 News reported that a trooper was transported to a hospital after being injured in a crash that closed lanes of Interstate 10 in southern Arizona, according to the Arizona Department of Public Safety. No further details about the circumstances of the crash were reported, and no findings about cause or responsibility have been announced.
When a crash on an Arizona highway involves an on-duty law enforcement officer or any other government employee, the claim runs on two separate clocks. Most Arizona injury lawsuits must be filed within two years under A.R.S. § 12-542. But anyone who wants to recover from a public entity or a public employee must first serve a written notice of claim within 180 days of the date the claim accrues, under A.R.S. § 12-821.01, and the deadline to file suit against a public entity afterward is shorter than the general two-year period. A notice that misses the 180-day window, or that omits a specific amount claimed and the facts supporting it, bars the claim entirely, no matter how serious the injury. The requirement runs only against claims brought against the government; a government employee injured by a private motorist files an ordinary claim on the ordinary two-year deadline, subject to comparative fault under A.R.S. § 12-2505.
Who You Are Filing Against Decides Your Deadline
The first question after a highway crash is not how much the case is worth. It is who the potential defendants are, because that answer sets the calendar.
- A private driver or a private company. Two years from the date of injury under A.R.S. § 12-542. A commercial carrier adds an employer to the claim, but the deadline is the same.
- A state agency, a county, a city, or an employee of any of them. A written notice of claim must be served within 180 days under A.R.S. § 12-821.01. The notice must state the facts supporting liability and a specific amount that will settle the claim, and it must be served on the correct person for that entity. The deadline to file suit against a public entity after the notice is shorter than two years, so treat the 180-day notice as the start of a fast track, not the end of one.
- Your own insurer. Uninsured and underinsured motorist coverage is contract-based, and most policies require prompt notice and cooperation. Read the policy before you assume it does not apply.
If you do not know yet who was involved or which agency employed them, serve the notice on every entity that plausibly belongs in the case. Serving a notice you later withdraw costs nothing. Missing one ends the claim.
What to Do in the First Weeks
Practical steps, in order of how quickly they stop mattering:
- Get medical care and keep going. Gaps in treatment are the single most common argument insurers use to discount an injury. If you were taken to a hospital and released, follow up.
- Request the crash report. The investigating agency assigns a report number at the scene. The report will identify drivers, insurers, and witnesses, and it is the document every adjuster starts from. A report is useful evidence, but the officer's narrative is not a legal finding of fault.
- Photograph everything you still control. Your vehicle before it is repaired or totaled, your injuries as they change, and any damaged property. Roadway evidence on an interstate is cleared within hours.
- Preserve electronic data. Vehicle event data recorders, dash cameras, and commercial vehicle telematics get overwritten or scrapped. A written preservation demand sent early is the only reliable way to keep them.
- Decline the recorded statement until you understand your own injuries. You are not required to give the other driver's insurer a recorded account, and early statements made before a diagnosis get quoted back at you later.
- Note that leaving the scene is a separate matter. A driver involved in a crash involving injury has duties to stop and remain under A.R.S. § 28-661; if a driver left, that becomes part of the investigation independent of any civil claim.
How Arizona Divides Fault in Multi-Vehicle Highway Crashes
Arizona uses pure comparative fault under A.R.S. § 12-2505. Your recovery is reduced by your own percentage of fault, but it is never eliminated by it. Someone found 60 percent responsible still recovers 40 percent of proven damages. This matters on interstates, where crashes often involve several vehicles, a first collision and then a secondary one, and disputes about speed, following distance, and lane position. Insurers routinely assign a large share of fault to an injured person early, before any real investigation, because that number anchors settlement talks.
Two consequences follow. First, do not accept an insurer's fault allocation as fixed; it is an opening position. Second, do not assume you have no claim because you think you contributed to the crash. In Arizona, partial fault reduces a claim rather than ending it.
If you were hurt in a collision on I-10 or anywhere else in the state, our Arizona car accident practice page explains how these claims are built and what deadlines apply to yours.