The other driver’s head was down, their car drifted, and by the time they looked up, it was too late, and they crashed into you. But now they’re denying everything, and the insurance company won’t take your word for it. The stakes are very high, with the National Highway Traffic Safety Administration (NHTSA) reporting over 3,000 annual fatalities from distracted driving crashes alone. The CDC reports nine people are killed every day in crashes involving a distracted driver, with hundreds of thousands more injured each year. Texting while driving can be deadly.
Attorneys prove a driver was distracted or texting using cell phone records, camera footage, vehicle data recorders, witness testimony, the police report, and expert analysis. At HHJ Trial Attorneys, we have helped crash victims uncover this evidence and leverage it to support their claim.
This guide explores eight ways to prove a driver was distracted, plus why California’s hands-free law can work in your favor. We’ll also cover how fast key evidence disappears after a crash, and when it’s worth bringing in an attorney.
Why Proving Distraction Matters: Negligence Per Se in California
California Vehicle Code Section 23123.5 bars drivers from holding or operating a mobile phone unless it’s set up for hands-free use. When a driver breaks a law meant to protect the public, California treats that as negligence per se, meaning the violation itself creates a presumption of fault.
Instead of arguing about carelessness and negligence, cases must focus on proving that a handheld device was in use. Insurance adjusters understand this too. Clear proof of a Section 23123.5 violation typically increases settlement value, because the insurer knows a jury will see a driver who broke a safety law and caused real harm. If distracted driving cases go to trial, judges are more likely to rule in the victim’s favor.
8 Ways to Prove a Driver Was Distracted or Texting
No single piece of evidence can win a distracted driving case on its own. The strongest cases combine several of the methods below so each source of evidence reinforces the others and leaves the at-fault driver with no loopholes to exploit.
1. Evidence at the Scene
In the first minutes after a crash, look for what is in plain view: a phone still in the driver’s hand or glowing face-up on the seat, or an app open and visible through the window, as well as food or makeup that can indicate distraction. Take note of the driver’s statements as well. Apologies or admissions of guilt happen more often than you’d expect. Never risk further injury to gather evidence. If you’re hurt, you can ask a bystander to take photos for you, or if there is no safe way to photograph the inside of the other driver’s vehicle, take photos of what you can see and stay safe.
2. Cell Phone Records
Cell phone records are a primary source of proof in distracted driving cases. Attorneys can submit a subpoena to access a driver’s phone records to see if their phone was in use at the time of the impact. Communication logs highlight the duration of calls and the timing of incoming data. Obtaining cellphone records requires a legal professional who understands the specific privacy laws surrounding cellular data.
Detailed records from wireless carriers can reveal far more than just text messages. Buried in that metadata is often proof of exactly when a driver was using an app or pulling down data, right down to the minute. Most people don’t realize that their phone company keeps a meticulous log of every interaction the device has with cellular towers.
Keep in mind that detailed records are only kept for a limited time, so sending an evidence preservation letter early is critical. Reach out to a car accident attorney to draft a letter or file a subpoena.
3. The Phone Itself and Social Media Activity
Social media timestamps create a digital paper trail that is difficult to erase. Posts and direct messages on Instagram and TikTok include metadata with the precise time of the activity. Forensic specialists can examine a driver’s device to see if they were actively scrolling through an app or typing something when the accident occurred. Drivers forget that their public digital presence can be used against them in a personal injury lawsuit.
Furthermore, individual privacy settings don’t always protect a driver when interacting with a public profile. If a driver was liking or commenting on a post seconds before a crash, a court may order the release of the defendant’s account logs, even if they’re set to private. Digital forensic experts also have tools to recover data that was manually deleted from a phone. Deleting the social media apps doesn’t destroy the evidence.
Courts can order social media account logs even for private profiles. If the driver deletes files or tries to hide their phone, it’s considered destruction of evidence, a clear demonstration of guilt, that can result in potential criminal charges.
4. Camera Footage: Traffic, Surveillance, and Dashcams
Dashcam footage and surrounding surveillance systems can provide a visual record of a driver’s behavior leading up to a crash. Traffic cameras at busy intersections might show a driver looking down toward their lap rather than at the road ahead. Nearby business security cameras also provide angles that may capture the interior of a vehicle during a collision. Reconstructionists analyze the footage to prove how the driver behaved before the crash.
Interior views of a vehicle are particularly valuable for proving that a driver was holding a handheld device. High-definition footage can reveal the glow of a screen or the specific hand movements associated with typing. Footage from a victim’s own dashcam might capture the other vehicle drifting across lanes or traveling at inconsistent speeds. Erratic driving patterns are common indicators of a distracted driver. Most footage is overwritten within a few days, making evidence preservation, or spoliation- or evidence preservation letters, even more essential.
5. Vehicle Data Recorders
Modern vehicles log important information about the car and driver behavior in the background. Event data recorders (EDRs), also called black boxes, log speed, steering input, braking, and even infotainment and touchscreen interaction in the seconds before a crash. One behavior is particularly illuminating: no braking before impact. Failing to brake at all before hitting another vehicle is a clear sign that a driver didn’t see the hazard.
EDR logs stay in the car itself, so your attorney must submit a subpoena before the other driver’s vehicle is repaired, sold, or scrapped. The data stored in the black box can make the difference between a successful case and a denied claim.
6. Eyewitness Testimony
Eyewitness accounts are a vital component of any car accident investigation. Passengers in other cars or pedestrians nearby may have seen the driver looking at their phone right before the impact. Statements from witnesses provide a human perspective that supports the data found in digital records. Collect names and contact information at the scene, because witnesses can be difficult to track down later.
It can also be beneficial to record informal witness statements at the scene using your phone. You can record voice notes in a text messaging app and send them to a trusted contact for later use. Memories fade over time, so saving statements from witnesses while their memories are fresh can help navigate forgetfulness a few months later.
7. The Police Report
After an accident, you should always contact the police. Remember that you may not leave the scene before law enforcement arrives, unless you’re taken to hospital in an ambulance. The responding officer will create an official record that carries significant weight with judges and insurance adjusters.
The police report covers the officer’s observations, any admissions the driver made, witness statements, citations issued for phone use, and occasionally an inspection of the phone itself. It won’t decide the case on its own, but it gives attorneys a solid starting point for discovery.
8. Accident Reconstruction Experts
If the parties involved in the crash cannot agree about who was at fault, or one side denies the other’s assertions, attorneys must escalate the case for expert forensic analysis. Accident reconstruction specialists combine skid mark patterns (or the lack thereof), debris, vehicle damage, and EDR logs to show how the crash unfolded. The absence of pre-impact braking or evasive steering is often the most telling evidence.
How HHJ Trial Attorneys Build Distracted Driving Cases
While not legally required, working with a car accident lawyer can make your claim significantly easier. At HHJ Trial Attorneys, our team has the expertise and experience to identify and secure valuable evidence before it’s compromised. We send preservation letters before records and footage disappear, subpoena phone records, canvass the area for sources of video evidence, and bring in experts to reconstruct the crash. In September, 2025, we secured a $65,000 settlement for a driver who was t-boned by a distracted driver.
We work on a contingency fee basis, which means you don’t pay us unless we win your case. This allows crash victims to access professional legal representation without the immense financial demands of retaining legal counsel from other firms. We also offer free case reviews so you can understand your options without any obligations to hire us. Contact HHJ Trial Attorneys at (619) 465-8733 or through our online contact form to speak to an expert San Diego car accident lawyer.
