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Insurance companies don’t pay claims because someone says they were hurt. They pay claims because the evidence forces them to. Whether you’re negotiating a settlement or preparing for trial, the strength of your case is the strength of your documentation — and the work of building that documentation starts on the day of the accident, not weeks later when an attorney gets involved. Here’s what evidence actually moves a Missouri personal injury claim forward, and how to preserve it.
The Four Categories of Personal Injury Evidence
1. Liability Evidence — Proving Fault
Liability evidence shows what happened and who caused it. In a St. Louis car accident case, this typically includes:
- The police accident report — Filed by the responding officer; available through the Missouri State Highway Patrol Crash Reports Portal or the local police department for city crashes.
- Photographs of the scene — Vehicle positions, damage, skid marks, debris, traffic signs, weather conditions, and any visible injuries.
- Surveillance and dashcam footage — Gas stations, intersections, businesses, and home security systems often capture crashes. This footage is frequently overwritten within days or weeks.
- Witness statements — Names, phone numbers, and what each witness saw. Independent witnesses carry enormous weight with juries and adjusters alike.
- Black box (event data recorder) data — Modern vehicles, especially commercial trucks, record speed, braking, and steering inputs in the seconds before a crash.
2. Injury Evidence — Proving Damages
You can’t recover for injuries you can’t document. Medical evidence shows the nature and extent of your harm and connects it to the accident. This category includes:
- Emergency room and hospital records from any Missouri trauma center where you were treated
- Diagnostic imaging — X-rays, CT scans, MRIs, and the radiology reports interpreting them
- Treatment records from primary care doctors, orthopedists, neurologists, physical therapists, chiropractors, and mental health providers
- Prescription records showing pain medication, muscle relaxants, antidepressants, or other treatment
- Photographs of visible injuries taken at intervals throughout recovery
- Medical bills and itemized statements
If you’re treating for a traumatic brain injury, a back injury, or another serious harm, neurological testing and functional capacity evaluations often become central pieces of evidence.
3. Economic Loss Evidence — Proving Financial Harm
Beyond medical bills, you can recover lost wages, lost earning capacity, and out-of-pocket expenses. Documentation includes:
- Pay stubs and W-2s or 1099s from before and after the accident
- A written wage-loss verification letter from your employer
- Tax returns showing income history
- Receipts for prescription co-pays, medical equipment, transportation to appointments, and home modifications
- Vocational reports if your ability to work has been permanently affected
This economic damages evidence is the foundation of any settlement valuation.
4. Non-Economic Loss Evidence — Proving Pain and Suffering
The hardest category to document, but often the most valuable. Non-economic evidence shows how the injury changed your daily life:
- A pain journal kept throughout recovery
- Photographs and video showing limitations (struggling to lift a child, climb stairs, perform job tasks)
- Statements from family members, friends, and coworkers describing changes since the accident
- Mental health records documenting anxiety, depression, or PTSD related to the trauma
- Records showing activities you can no longer participate in — hobbies, sports, work duties
These records support pain and suffering calculations, which often make up the largest portion of a serious injury settlement.
What to Do at the Scene to Preserve Evidence
If you’re physically able after a crash:
- Call 911. Get a police report and emergency medical response.
- Photograph everything. All vehicles, all angles, license plates, the broader scene, road conditions, traffic signals, weather, and any visible injuries.
- Get witness information. Names and phone numbers — not just descriptions.
- Don’t admit fault. Even casual statements like “I didn’t see you” can be used against you.
- Seek medical attention immediately. Gaps in treatment are one of the most common arguments insurance adjusters use to reduce a claim.
Our guide on what to do after an accident walks through this in more detail.
What Destroys Evidence in Personal Injury Cases
- Time. Surveillance video, skid marks, and witness memories deteriorate fast.
- Repairs. A repaired vehicle can no longer be inspected for crash dynamics or defect evidence.
- Social media. Anything you post can be used to argue you’re not really hurt. Adjusters routinely screenshot Facebook, Instagram, and TikTok profiles.
- Recorded statements. Adjusters use these to lock you into a version of events before you’ve fully understood your injuries.
- Gaps in medical treatment. Long gaps give the defense room to argue your injury isn’t related to the crash.
For more on how adjusters work against your case, see our guide on dealing with insurance companies.
How Schmittgens Injury Law Firm Builds the Evidentiary Record
When the firm takes on a case, the first priority is securing evidence before it disappears — sending preservation letters to trucking companies, requesting surveillance footage from nearby businesses, ordering crash reconstructions when needed, and obtaining every medical record from every provider. The strength of that record drives every negotiation that follows.
If you’ve been hurt anywhere in Missouri, contact Schmittgens Injury Law Firm for a free consultation. There’s no fee unless we recover compensation for you.