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Professional Detective Course
More than 2 million students worldwide

Professional Detective Course

Turn your instinct for the truth into a professional skill set that holds up in court. This course covers every core discipline of private investigation — from surveillance and evidence collection to financial fraud and expert testimony. Whether you're entering the field or formalizing your experience, this is the most complete detective training available.

Dedika for businesses

What you will learn:

You will learn how to conduct lawful surveillance, collect and preserve evidence, and interview witnesses using proven psychological techniques. The course covers open source intelligence gathering, financial fraud detection, and asset tracing using public records and digital tools. You will also develop structured case management skills to handle complex, multi-source investigations from intake to closure. Training in courtroom testimony prepares you to present findings credibly under cross-examination. Optional modules cover cybercrime, undercover operations, corporate investigations, and how to launch your own private investigation practice.

How you study in practice Professional Detective Course

How you practice Professional Detective Course

For companies looking to train their teams

With Dedika for businesses, the course includes exercises and examples tailored to your own business and the way your company needs.

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Course Content

8 Chapters • 39 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Foundations of Detective Work

  • Lesson 1 • Investigative Mindset and Critical Thinking

    Develops analytical habits, objectivity, and logical reasoning essential to detective work. Counteracts cognitive bias before students encounter real evidence.

  • Lesson 2 • Case Intake and Client Relations

    Teaches how to evaluate new cases, set client expectations, and draft engagement agreements. Ensures professional relationships start on clear, documented terms.

  • Lesson 3 • Legal and Ethical Boundaries

    Defines lawful investigative conduct, privacy rights, and professional ethics codes. Prevents legal violations before fieldwork begins.

  • Lesson 4 • The Detective Profession Defined

    Covers the history, roles, and distinctions between private and public investigators. Establishes professional identity as the baseline for all subsequent training.

Chapter 2See details

Evidence Collection and Preservation

  • Lesson 1 • Scene Documentation Techniques

    Trains systematic scene photography, sketching, and note-taking to capture complete context. Accurate documentation prevents evidence loss before collection begins.

  • Lesson 2 • Digital Evidence Fundamentals

    Introduces forensic imaging, metadata extraction, and hash verification for electronic files. Prepares students to handle digital evidence without altering source data.

  • Lesson 3 • Evidence Admissibility Standards

    Explains how evidence is evaluated for reliability and relevance in formal proceedings. Students learn to collect with admissibility in mind from the outset.

  • Lesson 4 • Chain of Custody Procedures

    Establishes strict handling, labeling, and transfer protocols that maintain evidence integrity. Broken custody chains can invalidate findings, making this section critical.

  • Lesson 5 • Types of Evidence

    Classifies physical, testimonial, documentary, and digital evidence and their relative weight. Provides the taxonomy students use throughout all evidence-handling chapters.

Chapter 3See details

Surveillance Techniques and Operations

  • Lesson 1 • Surveillance Equipment and Technology

    Introduces cameras, audio recorders, GPS devices, and covert equipment selection criteria. Ensures students choose tools appropriate to the legal and operational context.

  • Lesson 2 • Surveillance Report Writing

    Teaches structured narrative reporting of surveillance observations with timestamps and exhibits. Converts raw field notes into professional deliverables for clients and proceedings.

  • Lesson 3 • Stationary Surveillance Methods

    Covers fixed-position observation, vehicle setup, and cover story preparation for static operations. Builds the core skill set before mobile techniques are introduced.

  • Lesson 4 • Mobile Surveillance and Foot Follows

    Trains single-investigator and team-based mobile surveillance on foot and in vehicles. Builds on stationary skills by adding movement, counter-detection, and coordination.

  • Lesson 5 • Surveillance Law and Ethics

    Reviews legal limits on observation, recording, and tracking before any fieldwork is introduced. Grounds all surveillance skills in lawful, defensible practice.

Chapter 4See details

Interview and Interrogation Skills

  • Lesson 1 • Interview Planning and Preparation

    Covers pre-interview research, goal setting, and question design to maximize information yield. Preparation directly determines the quality of information obtained.

  • Lesson 2 • Rapport Building and Communication

    Trains active listening, mirroring, and empathy techniques that encourage voluntary disclosure. Rapport is the foundation of all productive investigative interviews.

  • Lesson 3 • Cognitive Interview Method

    Applies the cognitive interview framework to enhance witness memory recall without suggestion. Produces more complete and accurate accounts than standard questioning.

  • Lesson 4 • Detecting Deception

    Examines verbal, paraverbal, and behavioral indicators of deception and their limitations. Students apply structured analysis rather than relying on intuition alone.

  • Lesson 5 • Documenting Interview Outcomes

    Covers recording methods, verbatim transcription, and summary report writing for interviews. Accurate documentation preserves the evidentiary value of interview findings.

Chapter 5See details

Open Source Intelligence and Research

  • Lesson 1 • Subject Profiling and Link Analysis

    Synthesizes collected data into structured profiles and relationship maps using link analysis. Transforms raw information into actionable intelligence for case strategy.

  • Lesson 2 • Public Records and Database Research

    Covers access to court records, property filings, business registrations, and vital records. Teaches students to extract verified facts from authoritative official sources.

  • Lesson 3 • Social Media and Online Investigation

    Trains systematic search, archiving, and analysis of social media profiles and online activity. Builds on OSINT principles with platform-specific collection techniques.

  • Lesson 4 • OSINT Principles and Source Evaluation

    Defines open source intelligence, its legal boundaries, and criteria for evaluating source reliability. Establishes the analytical discipline required before any data collection begins.

  • Lesson 5 • OSINT Tools and Automation

    Introduces search aggregators, reverse lookup tools, and data visualization platforms. Increases research efficiency while maintaining source documentation standards.

Chapter 6See details

Financial Investigation and Fraud Detection

  • Lesson 1 • Fraud Investigation Reporting

    Structures findings into formal fraud investigation reports suitable for legal and regulatory use. Accurate, well-organized reports are the primary deliverable of financial cases.

  • Lesson 2 • Asset Tracing Techniques

    Covers tracing hidden assets through property records, corporate filings, and financial transfers. Builds on public records research skills from the OSINT chapter.

  • Lesson 3 • Common Fraud Schemes

    Catalogs embezzlement, billing fraud, payroll fraud, and asset misappropriation patterns. Pattern recognition enables faster identification of scheme type in active cases.

  • Lesson 4 • Financial Statement Analysis

    Teaches reading balance sheets, income statements, and cash flow reports to spot anomalies. Financial literacy is the prerequisite for all fraud detection work in this chapter.

  • Lesson 5 • Digital Financial Evidence

    Addresses collection and analysis of electronic transaction records, emails, and accounting files. Applies digital evidence principles to the financial investigation context.

Chapter 7See details

Case Management and Investigation Strategy

  • Lesson 1 • Investigation Planning and Tasking

    Covers work breakdown structures, task sequencing, and resource allocation for investigation plans. Structured planning prevents wasted effort and missed investigative leads.

  • Lesson 2 • Case File Organization

    Establishes physical and digital file structures, naming conventions, and version control for cases. Organized files prevent evidence loss and support efficient case review.

  • Lesson 3 • Case Closure and Final Reporting

    Covers criteria for closing a case, final report structure, and client debriefing procedures. Proper closure protects the investigator and delivers clear value to the client.

  • Lesson 4 • Multi-Source Evidence Synthesis

    Teaches corroboration, conflict resolution, and narrative construction across evidence types. Synthesizing evidence from prior chapters produces a coherent, defensible case theory.

  • Lesson 5 • Lead Management and Tracking

    Trains systematic logging, prioritization, and follow-up of investigative leads throughout a case. Prevents leads from being overlooked as case complexity increases.

Chapter 8See details

Testifying and Expert Witness Skills

  • Lesson 1 • Cross-Examination and Impeachment

    Prepares students to handle challenging questions, impeachment attempts, and hostile counsel tactics. Resilient cross-examination performance protects the integrity of investigative findings.

  • Lesson 2 • Direct Examination Techniques

    Trains clear, structured narrative delivery of findings in response to direct questions. Effective direct testimony establishes credibility before cross-examination begins.

  • Lesson 3 • Preparing Testimony and Exhibits

    Covers review of case files, exhibit preparation, and coordination with legal counsel before testimony. Thorough preparation is the single greatest predictor of effective testimony.

  • Lesson 4 • Report and Testimony Consistency

    Ensures alignment between written reports and oral testimony to prevent credibility damage. Inconsistencies between documents and testimony are the most common investigator vulnerability.

  • Lesson 5 • Understanding Legal Proceedings

    Orients students to deposition, hearing, and trial formats and the investigator's role in each. Contextual knowledge reduces anxiety and prevents procedural errors when testifying.

Certification

Your valid completion certificate

This course is for you:

  • Career changer: wants a structured path into licensed private investigation work.

  • Security professional: seeks to expand scope into formal investigative case management.

  • Insurance adjuster: needs field investigation skills to strengthen claims analysis work.

  • Legal professional: aims to understand investigative methods that support litigation strategy.

  • Compliance officer: wants fraud detection and documentation skills for internal investigations.

  • Curious self-starter: driven by a passion for uncovering truth through systematic research.

What our students say

Your classes are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of interest without needing to switch platforms... I thank you for everything you do, I've already recommended you to other people...
Giulio Carlo
Giulio CarloDigital Marketing Student
I like how the lessons are straight to the point and how I can switch chapters and skip content I don't need.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the presentation style and video transcription, which speeds up the process!
Luciana Alvarenga
Luciana AlvarengaNail Design Student
The platform is fast, simple to use. The diversity of content and complementary videos really help with learning.
André Felipe
André FelipePrompt Engineering Student

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