Criminal Investigator Course

Lesson 1 • Legal Authority and Jurisdiction

Defines the legal basis for investigative action and the boundaries of jurisdictional authority. Connects legal limits directly to admissibility of evidence.

Lesson 2 • Ethics and Professional Conduct

Establishes ethical standards governing investigator behavior, bias avoidance, and integrity. Ethical grounding prevents misconduct that undermines prosecutions.

Lesson 3 • Constitutional Rights and Due Process

Examines rights that protect suspects and witnesses during investigations. Ensures investigators act within constitutional constraints at every stage.

Lesson 4 • Overview of the Investigative Process

Maps the end-to-end investigative cycle from initial report to case closure. Provides a structural framework referenced throughout the course.

Lesson 1 • Scene Documentation Reports

Guides preparation of comprehensive scene documentation reports that integrate photos, sketches, and notes. Accurate reports form the evidentiary backbone of the case file.

Lesson 2 • Crime Scene Photography and Videography

Teaches systematic visual documentation using photography and video to create a permanent scene record. Images support courtroom presentation and peer review.

Lesson 3 • Sketching and Mapping the Scene

Instructs manual and digital methods for producing accurate scene sketches and measurements. Sketches complement photographs by providing spatial relationships.

Lesson 4 • Securing and Controlling the Scene

Covers immediate actions upon arrival to establish perimeter control and limit contamination. Scene security is the prerequisite for all evidence collection.

Lesson 1 • Principles of Evidence Handling

Establishes core rules for touching, moving, and packaging evidence to prevent degradation. These principles underpin every collection technique taught in this chapter.

Lesson 2 • Collecting Trace and Physical Evidence

Addresses collection of fibers, glass, soil, tool marks, and impression evidence. Each evidence type demands specific tools and packaging to preserve analytical value.

Lesson 3 • Collecting Biological Evidence

Covers collection of blood, saliva, hair, and tissue samples using appropriate tools and packaging. Biological evidence requires specific handling to prevent DNA degradation.

Lesson 4 • Digital Evidence Identification and Seizure

Introduces protocols for identifying and seizing electronic devices without altering stored data. Digital evidence seizure is governed by strict legal and technical requirements.

Lesson 1 • Forensic Pathology and Death Investigation

Covers manner and cause of death determinations, autopsy findings, and postmortem indicators. Investigators use pathology results to establish timelines and identify suspects.

Lesson 2 • Ballistics and Firearms Evidence

Addresses firearm identification, trajectory analysis, and gunshot residue examination. Ballistic evidence reconstructs shooting events and links weapons to crimes.

Lesson 3 • DNA Evidence and Interpretation

Explains DNA profiling processes, mixture interpretation, and database matching. Investigators must understand results well enough to direct collection and explain findings.

Lesson 4 • Fingerprint Analysis

Teaches latent, patent, and plastic print development and comparison methods. Fingerprint evidence links individuals to scenes and objects with high evidentiary value.

Lesson 1 • Documenting and Preserving Statements

Guides accurate transcription, audio-visual recording, and formal statement preparation. Properly preserved statements are critical evidence at trial.

Lesson 2 • Suspect Interviewing Strategies

Covers structured approaches to interviewing suspects while respecting legal rights and avoiding coercion. Ethical suspect interviews yield reliable information and withstand legal scrutiny.

Lesson 3 • Interrogation Law and Admissibility

Examines legal requirements for voluntary confessions and the consequences of coercive tactics. Investigators must ensure every statement meets admissibility standards before relying on it.

Lesson 4 • Principles of Effective Communication

Establishes active listening, rapport building, and nonverbal awareness as the foundation of all interviews. Strong communication skills increase information yield and reduce false confessions.

Lesson 1 • Electronic and Technical Surveillance

Addresses lawful use of audio, video, and tracking devices to monitor criminal activity. Technical surveillance requires prior legal authorization and strict operational security.

Lesson 2 • Intelligence Analysis and Dissemination

Introduces methods for evaluating, synthesizing, and sharing intelligence within investigative teams. Analyzed intelligence drives investigative decisions and resource allocation.

Lesson 3 • Open-Source Intelligence Collection

Teaches systematic collection and analysis of publicly available information from online and physical sources. OSINT supplements covert methods and often reveals leads quickly.

Lesson 4 • Physical Surveillance Techniques

Covers stationary and mobile surveillance methods used to observe subjects without detection. Effective surveillance generates intelligence and corroborates other evidence.

Lesson 1 • Working with Prosecutors

Defines the investigator's role in supporting charging decisions, discovery, and trial preparation. Early and ongoing prosecutor collaboration strengthens case outcomes.

Lesson 2 • Developing the Investigative Plan

Guides creation of a structured investigative plan with clear objectives, timelines, and resource assignments. A written plan keeps complex investigations on track and accountable.

Lesson 3 • Suspect Identification and Elimination

Covers systematic methods for generating, prioritizing, and eliminating suspects using evidence and logic. Rigorous suspect management prevents tunnel vision and wrongful focus.

Lesson 4 • Cold Case and Unsolved Case Review

Applies strategic review techniques to reopen and advance unsolved investigations using new evidence or methods. Cold case review demonstrates advanced application of all prior skills.

Lesson 1 • Direct Examination Techniques

Trains investigators to deliver clear, organized testimony during direct examination. Structured direct testimony guides the jury through complex evidence logically.

Lesson 2 • Post-Trial Review and Lessons Learned

Establishes a structured process for reviewing case outcomes to improve future investigative practice. Continuous improvement is the hallmark of a professional investigator.

Lesson 3 • Cross-Examination and Impeachment

Prepares investigators to withstand aggressive cross-examination and challenges to credibility. Anticipating defense tactics reduces the risk of damaging admissions.

Lesson 4 • Principles of Expert and Fact Testimony

Distinguishes fact witness from expert witness roles and the standards governing each. Understanding these roles helps investigators present testimony within proper legal boundaries.