The evidence that decides most Colorado injury claims is simpler than people expect: photographs of the scene before it changes, medical records that start the day you are hurt and continue without long gaps, the names and phone numbers of anyone who saw what happened, and proof of the money the injury has cost you. Nothing exotic. The problem is that almost all of it is easiest to collect in the first days and weeks, and it gets harder or impossible to recover after that. An insurance adjuster is not going to go gather it for you.
Below is a plain checklist of what tends to matter, why it matters, and which pieces have a clock on them.
Why evidence for a personal injury claim in Colorado carries extra weight
Colorado follows modified comparative fault with a 50 percent bar. If a jury finds you were partly responsible, your recovery is reduced by your share. If it finds you were 50 percent or more at fault, you recover nothing at all. That rule gives the other side a strong incentive to build a story in which you were careless too: you were speeding, you were on your phone, you ignored a warning sign, you were not watching where you were walking.
Evidence is how that story gets tested. A clear photo of an unlit stairwell, a witness who says the other driver ran the light, or a dashcam clip showing your speed does more than prove the other party did something wrong. It takes a percentage of blame off of you, and in Colorado that percentage is the difference between a reduced recovery and no recovery.
There is also a deadline on the whole thing. Under C.R.S. 13-80-102, most personal injury claims in Colorado must be filed within three years. Under C.R.S. 13-80-101, claims arising from motor vehicle accidents have a two-year window. Evidence collected carefully means very little if the filing deadline has already passed, so the calendar and the checklist run together.
Evidence from the scene, which disappears fastest
Scenes get cleaned up. Vehicles get repaired or sold for scrap. Spills get mopped. Broken railings get replaced, sometimes within hours, and the repair itself erases the proof of the hazard. This category is the most urgent for that reason.
- Photos and video from several angles. Wide shots that show the whole scene and context, then close shots of the specific hazard or damage. Include something for scale when you can.
- The condition that caused it. The ice, the pothole, the unmarked step, the missing handrail, the burned-out light, the merchandise in the aisle.
- Vehicle damage on every car involved, including license plates, and skid marks or debris fields in the roadway.
- Weather, lighting, and time of day. A photo with a timestamp helps establish what visibility was actually like.
- Warning signs that were there, or the absence of signs that should have been. Both directions matter.
- Your clothing and footwear if a fall is involved, kept unwashed. Opposing counsel often argues the shoes were the problem.
If you could not take photos because you were being loaded into an ambulance, that is normal and it is not fatal to a claim. Someone else may have. Ask whoever was with you, and consider whether a nearby business, parking garage, doorbell camera, or traffic camera might have recorded it. Video retention periods are often measured in days or weeks, which is why a written preservation request sent early matters more than a request sent after the footage is gone.
Medical records, and the gap problem
Medical documentation does two jobs. It shows how badly you were hurt, and it ties that injury to the incident rather than to something else in your life. The second job is where claims most often weaken.
- Emergency room, urgent care, or first-visit records, including the intake notes describing how the injury happened in your own words.
- Imaging. X-rays, CT scans, MRIs, and the radiologist's reports, which are separate documents from the images.
- Every follow-up visit with primary care, specialists, physical therapy, chiropractic, or mental health providers.
- Prescriptions and pharmacy records, including over-the-counter medication you are relying on.
- Referrals and recommended treatment, especially treatment you have not completed yet.
- Your own symptom journal. Short dated entries about pain levels, sleep, what you could not do that day. This is ordinary evidence and it is often the only record of noneconomic harm.
Long unexplained gaps in treatment invite the argument that you recovered and that any later complaint is unrelated. Sometimes gaps are unavoidable, because of cost, transportation, childcare, or a provider's waiting list. Documenting the reason for a gap is more useful than pretending it is not there.
Colorado also caps certain damages, which affects what documentation is worth gathering. Noneconomic damages, meaning pain, suffering, and loss of enjoyment of life, are subject to a statutory cap of roughly $642,180, which a court may raise to approximately $1,000,000 on clear and convincing evidence. Economic losses like medical bills and lost wages are treated separately, which is one reason careful records of actual out-of-pocket cost matter so much.
Proof of what the injury has cost you
Economic damages generally have to be shown with paper, not estimates. Receipts are unglamorous and they are frequently the easiest part of a claim to prove.
- All medical bills and billing statements, plus insurance explanations of benefits showing what was paid and what you still owe.
- Pay stubs before and after the injury, and a letter from your employer describing missed time, reduced hours, or changed duties.
- Self-employment records if you do not get a pay stub: invoices, canceled appointments, 1099s, bank deposits.
- Out-of-pocket expenses. Mileage to appointments, parking, crutches, braces, prescriptions, home modifications.
- Replacement services you now pay for, such as housecleaning, lawn care, or childcare you previously handled yourself.
- Property damage estimates and repair invoices.
Witnesses, official reports, and your own account
Memory fades and people move. A phone number collected at the scene is worth more than one tracked down a year later.
- Names, phone numbers, and email addresses for every witness, including people who arrived just after.
- The police report or incident report number. For a store or business, ask whether an internal incident report was created and note who you reported it to.
- Insurance information for all parties, including your own policy documents and coverage limits.
- A written account you prepare as soon as you can, while details are fresh. Where you were going, what you saw, what was said.
- Preserved digital records. Texts, call logs, dashcam and helmet cam footage, phone health or fitness data, app ride records.
One practical caution about your own account: statements you make, including recorded statements to an insurance adjuster and public posts on social media, become evidence that can be used against you. A cheerful vacation photo posted while claiming a back injury is a routine exhibit at depositions.
The bottom line
Gather what you can now, and gather it in the order of what disappears first: scene photos and video, then witness contact information, then records and receipts that institutions will still have months from now. Colorado's modified comparative fault rule means evidence is not only about proving the other party was careless, it is about protecting yourself from carrying a share of the blame. And none of it helps after the filing deadline, which under C.R.S. 13-80-102 is generally three years for personal injury claims and under C.R.S. 13-80-101 is two years for motor vehicle accidents. If you are unsure which deadline applies to your situation, or what evidence a particular type of claim requires, that question is worth asking a licensed Colorado attorney early rather than late.
This article is general information about Colorado law and is not legal advice. Laws change and every case is different. Talk to a licensed attorney about your situation.