In a Florida personal injury case, the burden of proof is on you — the injured party — to prove that the defendant was negligent and that their negligence caused your injuries. The strength of your case depends almost entirely on the evidence you gather and preserve.

Here is what evidence matters most and how to protect it.

To win a personal injury case in Florida, you must prove four elements:

1. Duty — the defendant owed you a duty of care
2. Breach — the defendant breached that duty
3. Causation — the breach caused your injuries
4. Damages — you suffered actual damages as a result

Evidence is needed to prove each element. The stronger your evidence on each point, the stronger your case.

For car accidents, the police report is often the most important piece of initial evidence. It documents:

• The date, time, and location of the accident
• The parties involved and their insurance information
• Witness names and contact information
• The officer's observations and preliminary fault determination
• Any citations issued

For slip and fall accidents, an incident report filed with the property owner serves a similar purpose.

Action: Always call the police after a car accident. Always report a slip and fall to the property manager before leaving.

Visual evidence is powerful and persuasive. Photograph:

• The accident scene from multiple angles
• Vehicle damage (all vehicles involved)
• Road conditions, weather, traffic controls, and signage
• Your visible injuries (bruises, cuts, swelling) — from the day of the accident through recovery
• The hazard that caused your slip and fall (wet floor, broken step, poor lighting)

Video evidence — from surveillance cameras, dashcams, doorbell cameras, or traffic cameras — can be decisive. This footage is often overwritten within days. Your attorney must send a preservation letter immediately to prevent destruction.

Independent witnesses who saw the accident carry significant weight with juries. Get names and contact information at the scene. Your attorney will follow up to take formal statements.

Your medical records are the foundation of your damages case. They document:

• The nature and extent of your injuries
• The treatment you received
• Your prognosis and any permanent impairment
• The connection between the accident and your injuries (causation)

Important: Gaps in treatment give insurers ammunition to argue your injuries are not serious. Attend every appointment and follow your doctor's instructions.

Expert witnesses explain technical matters that are beyond the knowledge of an average juror:

• Medical experts — testify about the nature of your injuries, causation, and future medical needs
• Accident reconstruction experts — recreate the accident to establish how it happened and who was at fault
• Economic experts — calculate future lost earning capacity and the present value of future medical expenses
• Life care planners — document the cost of future care for catastrophic injuries

Modern vehicles contain event data recorders (EDRs) — sometimes called "black boxes" — that record speed, braking, steering, and other data in the seconds before a crash. This data can be critical in disputed liability cases.

Cell phone records can prove a driver was texting at the time of the accident. GPS data can establish vehicle location and speed.

This data must be preserved immediately — it can be overwritten or lost if not secured promptly.

To prove lost wages and lost earning capacity, you will need:

• Pay stubs and tax returns
• Employment records showing your position, salary, and hours
• A letter from your employer documenting missed work
• Expert testimony on future earning capacity for serious injuries

Keep a daily injury journal from the day of the accident. Record:

• Your pain levels (1–10 scale)
• Activities you cannot perform because of your injuries
• How your injuries affect your sleep, mood, and relationships
• Every medical appointment and what was discussed

This contemporaneous documentation is powerful evidence of your pain and suffering.

Spoliation is the destruction, alteration, or failure to preserve evidence that is relevant to litigation. In Florida, if a party destroys relevant evidence, the court may:

• Give the jury a spoliation instruction — telling them they can infer the destroyed evidence was unfavorable to the party that destroyed it
• Dismiss the case or enter a default judgment against the spoliating party in egregious cases

This is why your attorney sends preservation letters immediately after being retained — to put potential defendants on notice that evidence must be preserved.

An experienced personal injury attorney will:

• Send preservation letters to all parties and potential witnesses
• Subpoena surveillance footage before it is overwritten
• Hire accident reconstruction experts when liability is disputed
• Retain medical experts to document causation and future needs
• Obtain cell phone records and EDR data through discovery
• Take depositions of witnesses, defendants, and experts

The earlier you hire an attorney, the better your chances of preserving critical evidence.

Juan Cordero Lawyers investigates personal injury cases throughout Florida, including Car Accident Lawyer Florida, Slip and Fall Lawyer Florida, and Negligent Security Lawyer Florida claims. Call 305.525.8957 for a free consultation — available 24 hours a day, 7 days a week.