Advanced litigation guide
Evidence Preservation, Discovery, Depositions, Motions and Trial Strategy
This pillar is part of the Aaron Herbert Texas Walmart Injury Knowledge Hub. The parent guide explains injury claims for consumers and families. This article examines how counsel investigates and prepares those claims for litigation.

Litigating a Walmart injury case in Texas starts with identifying the responsible parties and the legal theory supported by the facts. Counsel must preserve evidence, establish each liability element, document causation and damages, and prepare for defenses. Surveillance, inspection records, employee testimony and medical evidence may be central. Discovery and trial preparation must fit the particular incident; a falling-merchandise claim or security case cannot automatically be analyzed as a floor-spill case.
Walmart injury litigation includes more than slips and falls. A customer may be struck by merchandise, injured during an employee's work, hurt in a parking lot or harmed in an incident involving security. The store's name does not establish liability. The first task is to determine what happened, who controlled the relevant activity or property, and what duty applied.
This guide follows the work from the first interview through trial. The examples describe investigation choices, not findings about a particular Walmart store or a uniform company practice. Retention periods, staffing, equipment and records must be established in the individual case.
In this litigation guide
- 1. Initial client investigation
- 2. Identifying the correct Walmart entity
- 3. Preservation and spoliation
- 4. Surveillance and electronically stored information
- 5. Incident reports and investigation files
- 6. Inspection and safety-sweep records
- 7. Written discovery
- 8. Corporate-representative depositions
- 9. Employee and manager depositions
- 10. Actual and constructive notice
- 11. Warning adequacy
- 12. Open-and-obvious and comparative-responsibility defenses
- 13. Medical causation and damages
- 14. Experts
- 15. Summary judgment
- 16. Motions in limine and evidentiary issues
- 17. Trial themes, exhibits and jury instructions
- Questions about Walmart injury litigation
- Authorities and further reading
- About Aaron A. Herbert
1. Initial client investigation
Take the client’s account without filling gaps in memory. The intake record should identify:
Store: the address and location involved. Date and time: the incident date and best supported estimate of the time. Place: the aisle, display, entrance, parking area, or other exact location. Sequence: what the client saw before the injury and what changed afterward.
For each fact, note who can establish it. A customer may have seen a box fall but not how it was placed on the shelf; a witness or store record may be needed for that part of the sequence. Keep the client’s own observations distinct from what others later said, including conversations after the injury and when symptoms began.
Preserve original photographs, receipts, incident paperwork and witness details. Keep the files in their original form so their source and timing can be checked later.
A receipt or phone record can narrow the search for video. First compare its time with the camera clock; the two systems may not agree, so matching timestamps should not be assumed.
Keep some wider photographs. A close view of the hazard can omit the display that blocked it, the lighting, a sign, or a cart in the customer’s path. Relevant shoes and damaged belongings should be kept without alteration.
Timing also helps identify the legal theory. Was an employee moving the load when it struck the customer, or had the employee finished and left a dangerous condition behind? An ongoing activity and a premises condition require different analysis.
Stacking and handling evidence belongs in a fallen-merchandise investigation. Duty and foreseeability require separate attention when the injury arose from a parking-lot assault.
Product and pharmacy allegations can add parties and legal requirements. They should be investigated where the facts support them. The process described here is broader than litigation over floor spills.
2. Identifying the correct Walmart entity
Verify the defendant’s legal name before putting it in the petition. Store branding is not enough.
The operator on the incident date may differ from the property owner. Control of the relevant area or activity must also be established. Those are factual questions for records and discovery.
A contractor’s work may matter, but a name in the file is not enough. Establish the role of a maintenance company, landlord, or manufacturer before deciding whether it belongs in the suit.
Business records and discovery can resolve an uncertain entity name. Also verify the registered agent and how that defendant must be served.
Check jurisdiction, venue, and potential removal before filing. Calendar limitations and service separately from settlement negotiations.
Section 16.003 of the Texas Civil Practice and Remedies Code generally gives two years to file a personal-injury suit. The applicable accrual date, any exception, and any different statute still need to be evaluated for the particular claim.
An open claim number does not extend the filing deadline. The insurer may still be investigating while the limitations period runs.
3. Preservation and spoliation
Identify the incident in the request:
Store and area: enough detail to locate the relevant cameras and records. Date and interval: the period counsel asks to preserve. Reason for the interval: what the surrounding footage may show, such as stocking activity or a pre-injury inspection.
What should be preserved depends on the incident. That may include surveillance in its original export with metadata, an inspection entry and related messages, a maintenance ticket, incident records, photographs, or the physical item itself. Tie each requested category to the facts rather than sending an undifferentiated list.
Receipt should be documented and followed up. A preservation letter does not compel production. Delivery of the records may have to be pursued in discovery, with a court ruling if the dispute cannot be resolved.
The client also needs clear preservation guidance. Relevant messages, original files and physical items should remain intact, even when some of the material may be unfavorable.
Before requesting a remedy for missing footage, develop the record on whether it existed, who controlled it, when a preservation duty arose, and how its loss affects proof. Missing video alone does not justify a favorable instruction to the jury. For the Texas analysis, work from Brookshire Brothers, Ltd. v. Aldridge, 438 S.W.3d 9 (Tex. 2014): preservation duty, breach, culpability, and prejudice. Use Federal Rule 37(e) for the applicable lost-ESI inquiry in federal court.

4. Surveillance and electronically stored information
Footage of the impact may show how the person was hurt without showing how the danger arose. Explain the need for an earlier or later interval and for adjoining views.
A second camera might show merchandise being stocked. In a parking-lot case, entrances and movement through nearby areas may be more useful. Lighting can matter there as well. Choose the request around the question the footage could answer.
Review the recording and export with these questions in mind:
Completeness: does the file include the requested interval and every recorded frame? Quality: did exporting change the image or omit material? Timing: is the camera clock accurate? Audio: was any recorded, and is it included? Use in court: what is needed to play and authenticate the file?
Retention is another factual question. This guide assumes no company-wide Walmart overwrite deadline; find out how the actual system was configured and what happened to these recordings.
Relevant electronic records may sit in an inspection application, message thread, task system, or maintenance ticket. Identify the system and custodian before concluding that a record is missing.
Request a usable format and define the relevant store, period, and record categories. Keep the scope proportionate to the dispute rather than seeking every corporate electronic record.
5. Incident reports and investigation files
Review the incident report together with its attachments, photographs, witness information and revisions. Its sources may be more useful than its conclusions, so identify who supplied each detail.
Establish how the report was prepared. The author may have witnessed the event, interviewed others, or assembled information afterward; a manager’s summary can help orient the investigation without proving firsthand knowledge.
Expect some investigation records to draw privilege or work-product objections. Evaluate the protection asserted for the material in dispute. The fact that a document sits in a claims file does not, by itself, answer whether it must be produced.
Use the governing rules to obtain enough information to assess the objection. If court intervention is needed, identify the particular dispute rather than asking for a ruling on an undefined file.
6. Inspection and safety-sweep records
Obtain the inspection policy in effect that day, then find out how staff actually used it. Request the relevant entries and testimony from someone who can explain them.
An entry could mean that an inspection was completed, that a task was assigned, or that someone later corrected a record. Those meanings are not interchangeable.
Compare the log with the video and testimony. Did the employee inspect this spot or merely pass through the aisle? A documented inspection may help narrow when the condition appeared.
A gap in the log deserves follow-up. It does not tell counsel, on its own, how old the hazard was or prove the rest of the claim.
| Event or issue | Evidence to compare | Question to resolve |
|---|---|---|
| Condition first appears | Original video, witness account, maintenance record | Is the start time established or only inferred? |
| Inspection or employee encounter | Inspection entry, camera view, employee testimony | What area was inspected and what could the employee see? |
| Report or warning | Customer testimony, communications, sign placement | Who learned what, and when? |
| Injury and response | Video, photographs, incident report, treatment record | Does the evidence support the claimed mechanism and injury? |
7. Written discovery
Sort requests by the issue they address. Control records concern the proper party. Reports and timing concern notice. Warning or corrective-work records concern the response. Medical and employment records belong to the damages inquiry.
Use interrogatories, production requests and admissions for their distinct purposes. Define the store, time period, condition and record categories. Track responses against the request rather than treating a large production as a complete response. Address objections, missing attachments and unreadable files early enough to obtain a ruling before the relevant deadline.
The Texas Rules of Civil Procedure and applicable local rules govern a Texas state-court case. Federal procedure governs federal-court discovery. Check the discovery plan and scheduling order in the actual case; do not transfer a deadline or discovery limit from one forum to the other.
8. Corporate-representative depositions
Texas Rule 199.2(b)(1) and Federal Rule 30(b)(6) each allow examination of an organization through a designated witness, but their requirements differ. The notice should identify the subjects with reasonable particularity and follow the rule governing the case.
The procedures are not identical. In a federal case, account for Rule 30(b)(6)’s conference requirement as well as the other applicable obligations.
Potential topics include control of the property, relevant inspection procedures, surveillance operation, record retention, preservation steps and the search for responsive records. Tailor the subjects to issues supported by the case. An organization witness can explain a record system even if the witness did not see the accident; that does not make the witness a substitute for the employee who did.
Use the produced records during the examination. If the designated witness cannot address a noticed subject, ask what preparation occurred and what information remains unavailable.
That record gives the court something concrete to consider if counsel seeks relief. A bare list of unanswered questions may leave the reason for the problem unexplained.
9. Employee and manager depositions
An employee’s assignment and vantage point help explain what the witness could have seen. Separate the witness’s own actions and observations from information learned from someone else, and identify any record consulted to refresh memory.
A statement that someone “checked the area” needs detail: what the inspection involved, where the employee went, and what was visible along the way.
Photographs or video can help pin down distance, timing and obstructions. Let the witness describe the scene before using those materials to test the account.
For each time estimate, find out its source and how precise it is. The same chronology should show when a warning appeared and whether it was moved after the injury, while distinguishing what was known beforehand from what staff learned afterward.
10. Actual and constructive notice
In an invitee’s premises-condition case, ask two different notice questions. Did the defendant actually know of this dangerous condition? If not, had it been there long enough that reasonable care would have led to its discovery?
The first inquiry concerns actual knowledge. The second concerns constructive knowledge and often requires proof of duration. Keep the evidence supporting each theory separate.
An employee’s nearby location does not, alone, establish constructive notice. Wal-Mart Stores, Inc. v. Reece, 81 S.W.3d 812 (Tex. 2002), makes the timeline important.
The timeline matters alongside distance and visibility. An employee nearby while a condition is difficult to see presents a different record from an employee who had a clear view for a provable period. General awareness that spills happen does not show notice of the particular condition.
In Albertsons, LLC v. Mohammadi, 689 S.W.3d 313 (Tex. 2024), the Texas Supreme Court concluded that awareness of leaking items did not establish actual knowledge of a wet floor at the injury location. The decision concerns the proof of actual knowledge in that record; it should not be recast as a new test for constructive notice.
Evidence that an employee created a condition may support an inference of knowledge. It does not eliminate the need for the required knowledge finding.
Return to the cause of action before using these notice rules. An employee-activity claim, product claim, or negligent-security claim has its own requirements. A spill analysis cannot do the work for all three.

11. Warning adequacy
Look at the warning from the customer’s approach. Record its wording, location, visibility, and timing. A photograph taken after the injury may show a cone that was moved—or first placed there—afterward.
Find evidence of the sequence before treating that photograph as proof of the warning the customer encountered.
A cone may be relevant to knowledge of a danger and to the response to it. Neither question is settled by counting cones.
Do not end the inquiry at “there was a cone.” Determine what warning it gave a customer approaching this danger. Apply the duty of ordinary care to warn adequately or make the condition reasonably safe to the actual circumstances.
12. Open-and-obvious and comparative-responsibility defenses
Whether a danger was open and obvious depends on the injured person’s perspective at the time. Lighting, obstructions, how the condition appeared and the route available all matter; a photograph taken later may not capture the same view. Austin v. Kroger Texas, L.P., 465 S.W.3d 193 (Tex. 2015), discusses the general rule for known or obvious premises dangers and its recognized exceptions. An asserted exception needs proof of its requirements. Simply needing to enter the store does not establish them.
A duty question and a percentage-of-responsibility question do different work. Under Chapter 33, a claimant assigned more than 50 percent responsibility generally cannot recover. At 50 percent or less, the claimant’s percentage reduces otherwise recoverable damages. Investigate any alleged distraction, footwear issue, or other conduct, along with the role of other responsible persons. An allegation in a defense pleading is not evidence of that allegation.
13. Medical causation and damages
Build a second timeline for the medical proof. Put the first symptoms, complaints, treatment, diagnoses, and functional restrictions in order, alongside the incident timeline.
Ask about prior conditions, later events, and any break in treatment. Find the actual reason for a gap. The physician needs the complete history, including unfavorable facts, to assess causation.
Separate billed amounts, amounts recoverable under applicable law, future treatment, lost earnings and other claimed losses. Wage records, job duties and restrictions may be needed to support an earnings claim. Future needs require a factual and medical basis appropriate to the claim. Section 41.0105 and other applicable Texas damages rules should be considered when preparing medical-expense evidence.
Keep proof of fault separate from proof of loss. Neither the severity of a diagnosis nor strong liability evidence establishes the other part of the case.
A settlement assessment should address disputed causation, recoverable and collectible damages, litigation expense, and the client’s circumstances. There is no reliable Walmart-specific settlement formula.
14. Experts
Write down the technical question before retaining an expert. Is the dispute about shelf loading, a medical mechanism, or an unreliable recording?
Those questions may call for an engineer, a physician, or a digital-evidence specialist, respectively. Choose the discipline the evidence requires instead of hiring the same set of experts for every incident.
Preserve the material an expert would need to inspect. Supply relevant unfavorable evidence as well as favorable evidence, and require the opinion to explain its factual basis and method. Check qualifications, reliability, relevance, disclosure obligations and the governing scheduling order. Texas Rule of Evidence 702 and the applicable procedural rules address different parts of that preparation.
15. Summary judgment
As discovery develops, map admissible evidence to each element that must be proved: control, duty, breach, causation, damages and, when required, notice. Flag missing testimony or records early enough to pursue them.
For each gap, identify the next discovery step and its deadline. Waiting for the motion may leave too little time to obtain the proof.
Answer the grounds the motion actually raises. Pair the legal argument with record citations and address objections to the evidence. Pleaded allegations alone are not summary-judgment proof.
If more discovery is needed, make the request and showing that the governing rule requires. An unanswered discovery request does not automatically postpone a ruling.
Check the version of the rule before calculating the response date. Texas amended Rule 166a in 2026, with the amendments applying to summary-judgment motions filed on or after March 1, 2026. Consult the current rule, its applicability provisions, and the court’s orders. In federal court, turn to Federal Rule 56. An old Texas response calendar is not a safe substitute for either inquiry.
16. Motions in limine and evidentiary issues
Receiving a document in discovery is only the first step. For trial, identify the witness, certification, or other foundation that will support admitting it. Do this for each important exhibit.
Before trial, identify the foundation for each important exhibit and anticipate disputes involving authentication, business records, hearsay, experts, prior incidents or demonstratives.
A later repair should be analyzed under the applicable subsequent-remedial-measures rule, including any permitted evidentiary purpose. The repair alone does not establish negligence.
For an earlier incident, identify the proposed use and the factual connection that makes it relevant to this case.
A ruling on a motion in limine does not by itself settle every preservation-of-error issue. Plan trial objections, offers of proof and requests for rulings under the applicable rules. Keep the court's actual ruling with the exhibit and witness preparation materials.

17. Trial themes, exhibits and jury instructions
Choose exhibits around the questions the jury must decide. A synchronized timeline can show the competing accounts of notice. A supported display diagram can help explain a dispute over loading, handling, or control of merchandise.
Every step in the theory should lead back to evidence. Repeating that a store should have done better does not fill a missing element.
Label a reconstruction as a reconstruction. Keep the underlying files, distinguish them from the demonstrative, and test the playback equipment before trial.
Witness preparation should clarify what the witness knows and how the witness knows it. An assumption must not become a claimed observation during preparation.
Draft the proposed questions and instructions before the close of evidence. Compare them with the pleadings and proof, including notice, causation, responsibility, and damages as applicable.
Before the charge is settled, compare each submitted theory with the pleadings and trial proof and look for overlapping damages. Preserve requested instructions, objections and rulings under the procedure that applies.
Questions about Walmart injury litigation
Does this guide apply only to slip-and-fall injuries?
No. It addresses the litigation process for Walmart injury claims more broadly. The legal theory and investigation must change with the incident. Spill-notice rules do not automatically decide falling-merchandise, employee-activity or security claims.
Does sending a preservation letter guarantee access to surveillance?
No. The letter identifies material to retain. Obtaining a copy is a separate step and may require discovery or a court ruling.
Is there a standard period before Walmart footage is overwritten?
This guide assumes no universal period. Counsel must investigate the actual system, retention settings and preservation steps at the relevant location.
Will missing footage automatically establish the claim?
No. A spoliation remedy requires the applicable legal showing. Liability, causation and damages still need evidence.
Does an incident report admit fault?
Not necessarily. Examine what the report says, who supplied the information and the basis of each statement. Documenting an injury and admitting a legal element are different things.
Can a warning cone defeat the case?
A cone may be relevant, but its significance depends on the sequence and the warning it provided. The evidence should show whether it was present before the injury and whether it adequately warned of this danger under the applicable duty.
Can the case settle without trial?
It can, but no resolution is guaranteed. Evaluate a proposed settlement using the developed evidence, applicable law and the client's circumstances, while continuing to meet court deadlines.
How soon should the evidence be investigated?
An investigation is most useful when it begins promptly. Limitations periods do not preserve video or keep a physical condition unchanged, so evidence and witness accounts may need attention while the claim is still being evaluated.
Authorities and further reading
- Texas Judicial Branch: current procedural and evidence rules. Consult the rules and amendments applicable to the case.
- Federal Rules of Civil Procedure, including Rules 26, 30(b)(6), 37(e) and 56.
- Albertsons, LLC v. Mohammadi, 689 S.W.3d 313 (Tex. 2024), discussing actual knowledge and citing Reece and related premises authorities.
- Brookshire Brothers, Ltd. v. Aldridge, 438 S.W.3d 9 (Tex. 2014).
- Austin v. Kroger Texas, L.P., 465 S.W.3d 193 (Tex. 2015).
- Texas Civil Practice and Remedies Code Chapter 16, Chapter 33, and Chapter 41.
Discuss a Texas Walmart injury claim
Contact The Law Firm of Aaron A. Herbert, P.C. to discuss the incident and the evidence available. Keep original records and bring any incident paperwork to the consultation.
This guide provides general legal information, not advice about an individual case. It does not create an attorney-client relationship or promise an outcome. Applicable law, deadlines and litigation decisions depend on the facts and forum.
ABOUT THE ATTORNEY
Aaron A. Herbert
Founding Attorney
Board Certified in Personal Injury Trial Law
Aaron founded The Law Firm of Aaron A. Herbert in 2010 to focus on developing each client's case and seeking its maximum value. For over a decade, he has represented people seriously injured in major accidents and industrial catastrophes, pursuing trial verdicts and settlements while working to reduce the stress of litigation.
Education
- Texas A&M University · B.S., Criminal Justice, 1999
- University of Oklahoma College of Law · J.D., 2002; graduated in the top of his class
Trial experience & approach
Aaron earned numerous jury verdicts at boutique personal injury litigation firms. According to his biography, he spent a year as the top-earning litigation attorney at a firm that frequently appeared in verdict searches as having one of the highest numbers of trial wins in Texas. At another Dallas personal injury firm, he moved from managing pre-litigation attorney to managing litigation attorney over seven years as the firm grew into one of Dallas's largest personal injury firms.
His biography describes a reputation as one of America's most aggressive trial lawyers, with noteworthy recoveries from judges and juries and substantial pretrial settlements. Most of those settlements included confidentiality agreements requested by the defense. Aaron has said the recoveries were justified by the injuries and losses involved, which no amount of money could make someone choose to experience.
His approach combines passion, preparation, persistence and courtroom imagination. He believes a well-supported, engaged and motivated team working cooperatively helps deliver strong representation, with the goal of achieving the best possible result for every client.
Dallas roots, military service & publication
Born and raised in Dallas, Aaron enlisted in the United States Marine Corps after high school and later received an Honorable Discharge. He completed his university and law degrees after his military service and became a lifelong Sooners football fan in law school.
Publication: “Litigating Dog Bite Cases,” Texas Dog Law Seminar, Dallas, 2009.
Professional affiliations & recognition
Professional affiliations and recognition listed in Aaron’s biography:
- State Bar of Texas
- American Bar Association
- Association of Trial Lawyers of America (now American Association for Justice)
- Texas Trial Lawyers Association
- Dallas Trial Lawyers Association
- Dallas Bar Association
- Tarrant County Bar Association
- Million Dollar Advocates Forum
- The National Trial Lawyers – Top 100 Trial Lawyers
Trial experience & approach
Aaron earned numerous jury verdicts at boutique personal injury litigation firms. According to his biography, he spent a year as the top-earning litigation attorney at a firm that frequently appeared in verdict searches as having one of the highest numbers of trial wins in Texas. At another Dallas personal injury firm, he moved from managing pre-litigation attorney to managing litigation attorney over seven years as the firm grew into one of Dallas's largest personal injury firms.
His biography describes a reputation as one of America's most aggressive trial lawyers, with noteworthy recoveries from judges and juries and substantial pretrial settlements. Most of those settlements included confidentiality agreements requested by the defense. Aaron has said the recoveries were justified by the injuries and losses involved, which no amount of money could make someone choose to experience.
His approach combines passion, preparation, persistence and courtroom imagination. He believes a well-supported, engaged and motivated team working cooperatively helps deliver strong representation, with the goal of achieving the best possible result for every client.
Dallas roots, military service & publication
Born and raised in Dallas, Aaron enlisted in the United States Marine Corps after high school and later received an Honorable Discharge. He completed his university and law degrees after his military service and became a lifelong Sooners football fan in law school.
Publication: “Litigating Dog Bite Cases,” Texas Dog Law Seminar, Dallas, 2009.
Professional affiliations & recognition
Professional affiliations and recognition listed in Aaron’s biography:
- State Bar of Texas
- American Bar Association
- Association of Trial Lawyers of America (now American Association for Justice)
- Texas Trial Lawyers Association
- Dallas Trial Lawyers Association
- Dallas Bar Association
- Tarrant County Bar Association
- Million Dollar Advocates Forum
- The National Trial Lawyers – Top 100 Trial Lawyers
