A workplace death may involve compensation, employer immunity, and independent third parties at the same time.

The actor map should identify the worker's direct employer, staffing company, host employer, general contractor, subcontractors, site owner, operator, landlord, equipment owner and operator, manufacturer, supplier, maintenance company, utility, vehicle driver and employer, security, safety consultant, public entity, tribal enterprise, federal agency, and insurers. Contracts, payroll, supervision, work orders, indemnity, control, actual conduct, and operative law matter.

Oklahoma workers' compensation law can govern death benefits, exclusivity, employer immunity, occupational disease, course and scope, third-party claims, subrogation, liens, and settlement coordination. None of those issues should be answered from the accident description alone. Work across companies, public or Tribal employment, interstate travel, and driving between sites may raise additional coverage and jurisdictional questions.

Potential evidence includes the scene, equipment, guards, controls, interlocks, energy state, tools, personal protective equipment, fall protection, scaffold, trench, crane, vehicle, fire or explosion debris, chemical samples, permits, lockout or tagout, hot-work records, process data, alarms, video, access logs, phones, radios, dispatch, photographs, measurements, inspections, maintenance, training, job hazard analyses, staffing, prior complaints, incident reports, emergency response, medical examiner, autopsy, toxicology, and insurance investigations.

The Occupational Safety and Health Administration, Oklahoma Department of Labor, fire marshal, police, medical examiner, environmental or transportation agency, utility regulator, compensation carrier, employer, site owner, contractor, manufacturer, and insurer may each investigate or hold evidence. Their jurisdiction, reports, findings, privileges, access, and retention differ. A company report or agency citation should be preserved and evaluated without being treated as the civil verdict.

A compensation review should identify employment, covered injury or death, course and scope, dependents, notice, claim procedure, benefits, carrier, offsets, and current Title 85A requirements. A civil review should identify an actor outside any exclusive-remedy protection and prove that actor's independent duty and causal conduct. Product, premises, vehicle, utility, retained-control, negligent undertaking, professional, public-entity, and contractor theories each require their own evidence and defenses.

Technical and medical experts may address engineering, process safety, fire, explosion, electrical, construction, industrial hygiene, toxicology, vehicle, human factors, equipment, warnings, product condition, emergency response, injury mechanism, survival interval, and cause of death. An agency or internal safety rule may frame the work but is not a universal civil standard without exact applicability and legal review.

Counsel should verify the personal representative, probate orders and letters, dependents, beneficiaries, minors, survival, final expenses, liens, compensation claim, employer and carrier status, third-party defendants, settlement authority, and allocation. Public employment may implicate the Governmental Tort Claims Act or a separate compensation system. Tribal employment can raise sovereign immunity, tribal compensation, federal statutes, exhaustion, and forum. Federal employment or a federal site can raise other administrative and jurisdictional questions.

The calendar should separately track compensation notice and claim procedure, wrongful death, survival, the underlying third-party claim, product repose, public or federal notice, tribal procedure, evidence retention, agency access, probate appointment, insurance, venue, and jurisdiction. Work-resumption, equipment return, compensation payments, an Occupational Safety and Health Administration case, or a probate petition should not be assumed to pause a civil period.