After a collision, both drivers may claim the other person caused the crash. Insurance companies investigate to determine fault, but their conclusions don’t always reflect what actually happened. 

Determining who hit whom in a car accident requires examining physical evidence, including vehicle damage patterns, point of impact, skid marks, debris fields, and paint transfer, combined with electronic data from event data recorders (black boxes), dashcam or traffic camera footage, witness statements, and police reports. 

Attorney Ryan Orsatti works directly with car accident victims across San Antonio, Austin, Dallas, and Houston to investigate disputed fault crashes, preserve critical evidence, and counter insurance company tactics that unfairly blame innocent drivers.

Key Takeaways for Determining Fault in Texas Car Accidents

• Physical evidence, including damage patterns, point of impact, skid marks, and debris fields, reveal impact direction and vehicle positions before the crash
• Electronic data from vehicle black boxes, dashcams, traffic cameras, and cell phone records provide objective proof of speed, braking, and driver actions
• Police reports document the scene and may include fault determinations, but insurance companies and courts aren’t bound by officer opinions
• Texas comparative negligence rules reduce your compensation by your percentage of fault, making it critical to prove the other driver bears primary responsibility
• Spoliation letters sent immediately after crashes legally require all parties to preserve video footage and electronic data before deletion

Physical Evidence That Shows Who Hit Who

The collision scene and vehicle damage tell a story about how the crash happened, which direction vehicles were traveling, and where the impact occurred.

Vehicle Damage Patterns and Point of Impact

Where damage appears on vehicles reveals which parts struck each other and the angle of impact. Front-end damage on one vehicle and side damage on another suggests the first vehicle struck the second broadside (T-bone accident). Rear-end damage indicates one vehicle struck another from behind. Offset damage where only one side of the front bumper is crushed shows the striking vehicle wasn’t centered when it hit.

The severity and type of damage also matter. Deep crush damage indicates high-speed impact, while minor dents suggest slower collision speeds. Paint transfer from one vehicle to another confirms which vehicles made contact and sometimes reveals the impact angle.

Accident reconstruction experts, if needed, can analyze damage patterns using physics principles and crash databases to calculate impact speeds, determine which vehicle struck first in multi-vehicle crashes, and establish vehicle positions before the collision.

Skid Marks and Tire Evidence

Skid marks show where drivers braked hard before impact. These dark rubber streaks on pavement reveal vehicle paths, speeds, and whether drivers attempted to avoid the collision. Long skid marks suggest high speeds or delayed braking. Their direction shows whether vehicles were traveling straight or turning.

Yaw marks (curved tire marks from vehicles sliding sideways) indicate loss of control. These marks help reconstruct what happened when drivers swerved to avoid impact or lost control after being struck.

Debris Fields and Final Rest Positions

Where vehicle parts, broken glass, and other debris land reveals the impact location and force involved. Plastic pieces from broken headlights or grille components mark where vehicles collided. Fluid trails from leaking coolant or oil show where damaged vehicles traveled after impact.

Final rest positions combined with the debris field help experts work backward to determine pre-impact positions and movements.

Electronic Evidence in Modern Vehicles

Modern cars and trucks contain electronic systems that record data before, during, and after crashes. This objective evidence often proves who hit who when drivers give conflicting accounts.

Event Data Recorders (Black Boxes)

Most vehicles manufactured since the early 2000s contain event data recorders (EDRs), commonly called black boxes, that capture data in the seconds before and during crashes:

• Vehicle speed in five-second increments before impact
• Brake application and intensity
• Throttle position (whether the driver was accelerating)
• Steering angle and changes
• Seatbelt use and airbag deployment timing

This data proves whether drivers were speeding, whether they braked before impact, and whether they attempted to steer away. EDR data gets overwritten during subsequent driving and vehicle repairs, so your car accident attorney sends preservation letters immediately after crashes, legally requiring vehicle owners and insurance companies to download and preserve the data.

Commercial Vehicle Engine Control Modules

18-wheelers and commercial trucks contain more sophisticated recording systems called engine control modules (ECMs) that capture extensive data, including hours of operation, speed over time, hard braking events, and whether drivers violated hours-of-service regulations. When truck drivers claim car drivers caused crashes, ECM data may reveal the truck was speeding or the driver didn’t brake until after the impact.

Cell Phone Records and Telematics

Cell phone records show whether drivers were texting, calling, or using apps when crashes occurred. Phone carriers and attorneys can obtain records showing the timing of texts, calls, and data usage. If records show a driver sent a text at 3:47 PM and the crash occurred at 3:47 PM, that can prove distraction.

Insurance telematics programs that monitor driving through smartphone apps or plug-in devices record speed, braking, acceleration, and location. When drivers participate in these programs for insurance discounts, the data may prove or disprove their version of events.

Video Evidence From Multiple Sources

Video footage provides powerful proof of how crashes happened, often settling fault disputes that would otherwise depend on conflicting statements. 

Dashcam Footage

Dashboard cameras installed in vehicles record continuous footage of the road ahead and sometimes behind. When crashes occur, this footage shows traffic signals, lane positions, other vehicles’ movements, and the moment of impact. 

Drivers with dashcams should preserve footage immediately because most dashcams overwrite old footage as memory fills.

If the other driver has a dashcam, your attorney requests that footage through legal demands. Many modern vehicles have dashcams built into rearview mirrors or advanced driver assistance systems.

Traffic Cameras and Intersection Cameras

Major intersections in San Antonio, Austin, Dallas, and Houston often have traffic cameras monitoring traffic flow. While not all traffic cameras record footage, many do, and that footage may capture crashes. 

Your attorney identifies which agencies control cameras near the crash scene and requests footage before it’s automatically deleted, typically within 30 to 90 days.

Red light cameras at intersections capture still images and sometimes video of vehicles entering intersections on red lights. When drivers claim they had the green light, red light camera evidence may prove otherwise.

Business Surveillance Cameras

Businesses near crash scenes often have surveillance cameras pointed at parking lots, entrances, or streets that may have captured crashes. Gas stations, convenience stores, retail shops, restaurants, and office buildings all use security cameras. This footage typically gets overwritten within days or weeks unless someone requests preservation.

Your attorney identifies nearby businesses immediately after crashes, visits locations to confirm camera angles, and sends legal preservation demands before footage disappears.

Witness Statements and Their Role

People who saw crashes provide accounts of what happened, though witness reliability varies based on viewing angles, attention, and memory.

Independent witnesses provide the most credible testimony because they have no stake in the outcome. Witnesses in other vehicles stopped at lights, pedestrians on sidewalks, cyclists, or people in nearby businesses all may provide valuable statements.

Strong witness testimony includes specific details about what the witness saw rather than conclusions about fault. A witness who says “the red car ran the red light” provides better evidence than one who says “the red car caused the crash.” Details about traffic signal colors, which direction vehicles came from, whether brake lights illuminated, and the sequence of events all strengthen testimony.

Witnesses who gave statements immediately after crashes generally provide more accurate accounts than those interviewed days or weeks later when memories fade.

Police Reports and Official Crash Investigations

Police officers who respond to crashes document the scene, interview drivers and witnesses, and often include opinions about who caused the collision.

What Police Reports Contain

Texas officers investigating crashes complete reports documenting date, time, location, weather and road conditions, driver information and insurance details, vehicle damage descriptions, crash diagrams showing vehicle positions, contributing factors like speed or distracted driving, and officer opinions about who violated traffic laws.

These reports provide valuable documentation, but officers may not have time to conduct thorough investigations at busy scenes, may arrive after vehicles were moved, or may base conclusions on driver statements rather than physical evidence.

Police Fault Determinations Aren’t Final

When officers issue citations at crash scenes or indicate in reports that one driver violated traffic laws, insurance companies consider these opinions but aren’t bound by them. If officers cite the wrong driver or base conclusions on incomplete information, your attorney may challenge these findings with stronger evidence.

Common Crash Scenarios and Fault Determination

Certain crash types follow predictable patterns, though every collision requires individual analysis.

Rear-End Collisions

The general rule is that rear drivers bear fault for striking vehicles ahead because Texas law requires maintaining a sufficient following distance to stop safely. However, exceptions exist when front drivers reverse unexpectedly or when multiple-vehicle chain reactions make fault more complex.

Your attorney proves rear-end fault through damage patterns showing direct rear impact, lack of brake marks from the rear vehicle, and electronic data confirming the rear driver didn’t brake or braked too late.

Left-Turn Crashes

Drivers turning left across traffic must yield to oncoming vehicles. When left-turning drivers strike vehicles proceeding straight through intersections, they typically bear fault. However, if straight-traveling vehicles were speeding excessively, ran red lights, or otherwise violated traffic laws, fault may be shared.

Evidence proving left-turn fault includes damage to the left-turning vehicle’s front and the other vehicle’s side, witness testimony about signal colors, and traffic camera footage showing when each vehicle entered the intersection.

Lane Change and Merge Collisions

Drivers changing lanes or merging must yield to traffic already in the lane. Sideswipe damage, paint transfer, and witness statements about which vehicle moved laterally prove who changed lanes. When both drivers claim the other merged into them, electronic data showing steering inputs and video footage become critical.

Texas Comparative Negligence Rules

Texas follows modified comparative negligence, which affects how much you can recover when both drivers share some fault.

If you’re found 50% or less at fault, you may recover damages reduced by your fault percentage. If you’re 51% or more at fault, you recover nothing. 

Insurance companies use comparative negligence aggressively, arguing that even clearly negligent drivers share some blame to reduce payouts. Your attorney counters these arguments with evidence proving the other driver bears primary or sole responsibility.

Accident Reconstruction Expert Testimony

Complex crashes, disputed fault cases, and serious injury claims may require accident reconstruction experts who use physics, engineering, and scientific analysis to determine how crashes occurred.

If necessary, experts analyze vehicle damage and crush patterns, skid marks and tire evidence, electronic data from vehicle systems, scene photographs and measurements, and weather and road conditions. They create computer simulations, diagrams, and reports explaining their findings, then testify in court about their conclusions.

FAQ About Determining Fault in Car Accidents

Let Ryan Orsatti Law Prove Who’s Really at Fault

When insurance companies blame you for crashes you didn’t cause, deny liability despite clear evidence, or use comparative negligence tactics to reduce fair compensation, you need an attorney who investigates thoroughly and fights aggressively. 

Attorney Ryan Orsatti works directly with car accident victims across San Antonio, Austin, Dallas, and Houston to preserve critical evidence, obtain video footage and electronic data, and counter insurance company tactics that unfairly shift blame to innocent drivers.

Contact Ryan Orsatti Law at (210) 525-1200 for a free case evaluation. You’ll speak directly with Attorney Ryan Orsatti, not an intake specialist. The firm handles car accident cases on a contingency fee basis—you pay no attorney fees unless you recover compensation. Calls are answered 24/7 because evidence preservation can’t wait, and neither should your fight for justice.