Crime Scene Investigation and Forensic Science in the United States Course

Lesson 1 • Ethics and Professional Standards

It defines the ethical obligations of forensic professionals, including impartiality and accurate reporting. It connects professional conduct to the admissibility and credibility of evidence.

Lesson 2 • The Criminal Justice System Overview

It maps the roles of law enforcement, prosecutors, defence, and courts. It clarifies where forensic evidence enters and influences each stage of the justice process.

Lesson 3 • History and Evolution of Forensics

It traces forensic science from early identification methods to modern DNA analysis. It provides context for understanding why current standards and protocols exist.

Lesson 4 • Scientific Method in Forensic Practice

It applies hypothesis-driven reasoning to evidence analysis. It grounds you in objective methodology before you encounter specific forensic disciplines.

Lesson 1 • Scene Security and Access Control

It covers log procedures, barrier placement, and personnel management at active scenes. This directly supports chain of custody by limiting unauthorized access.

Lesson 2 • Jurisdictional Coordination and Command

It explains multi-agency roles and incident command structures at complex scenes. It prepares you to operate effectively within hierarchical response frameworks.

Lesson 3 • Scene Assessment and Walk-Through

It teaches systematic initial observation before evidence collection begins. It develops your ability to form a preliminary theory and prioritize collection.

Lesson 4 • Health and Safety at Crime Scenes

It addresses biological, chemical, and physical hazards investigators encounter. It ensures you can protect yourself and avoid cross-contamination of evidence.

Lesson 1 • Videography and Digital Documentation

It introduces video walkthroughs and digital capture tools as supplements to still photography. It connects moving-image documentation to courtroom presentation needs.

Lesson 2 • Forensic Photography Principles

It covers camera settings, lighting, and compositional rules specific to evidence photography. Accurate images are the foundation of all subsequent documentation.

Lesson 3 • Three-Dimensional Scene Reconstruction Tools

It introduces laser scanning and photogrammetry for precise spatial documentation. These technologies extend traditional methods for complex or large-scale scenes.

Lesson 4 • Field Notes and Written Reports

It establishes standards for contemporaneous note-taking and formal report writing. Thorough written records corroborate physical evidence and support testimony.

Lesson 1 • Evidence Recognition and Prioritization

It develops your ability to identify relevant physical evidence amid scene clutter. Prioritization ensures the most fragile or time-sensitive items are collected first.

Lesson 2 • Trace and Impression Evidence

It focuses on collection of fibres, glass, soil, footwear, and tool mark evidence. These small or fragile items require specialized techniques to capture intact.

Lesson 3 • Chain of Custody Documentation

It establishes rigorous labelling, sealing, and transfer documentation for every item. An unbroken chain of custody is essential for evidence to be admitted at trial.

Lesson 4 • Collection Tools and Techniques

It covers instrument selection and handling procedures for varied evidence types. Proper technique prevents contamination and preserves evidentiary value.

Lesson 1 • Serology and Presumptive Testing

It covers chemical tests used to identify the presence of blood, semen, and saliva. Presumptive results guide confirmatory testing and resource allocation.

Lesson 2 • CODIS and DNA Databases

It describes the national DNA database structure, submission criteria, and hit procedures. Database searches link unknown profiles to known offenders or unsolved cases.

Lesson 3 • Bloodstain Pattern Analysis Basics

It introduces the physics of blood behaviour and pattern classification. Pattern interpretation informs reconstruction of events and victim or suspect positioning.

Lesson 4 • DNA Typing Methods

It explains STR profiling, Y-STR, mitochondrial DNA, and touch DNA techniques. You will understand which method applies to each evidence type and its statistical weight.

Lesson 1 • Lifting and Preserving Developed Prints

It covers tape lifting, photography, and casting to preserve developed prints for analysis. Proper preservation prevents loss of detail before laboratory comparison.

Lesson 2 • Latent Print Development Techniques

It teaches physical and chemical methods for visualizing latent prints on varied surfaces. Method selection depends on surface type, age of deposit, and environmental conditions.

Lesson 3 • Footwear, Tyre, and Tool Mark Comparison

It extends impression evidence skills to non-fingerprint marks using class and individual characteristics. Comparison methodology mirrors fingerprint analysis but requires distinct documentation.

Lesson 4 • Fingerprint Classification and Anatomy

It covers ridge detail, pattern types, and the basis of fingerprint individuality. This foundation is required before you attempt development or comparison.

Lesson 1 • Alcohol Analysis and Impairment

It explains breath, blood, and urine alcohol testing methods and their legal thresholds. You will understand sources of error and how to defend results under cross-examination.

Lesson 2 • Gunshot Residue Analysis

It covers collection, SEM-EDX analysis, and interpretation of gunshot residue particles. Results indicate proximity to a discharged firearm and support shooting reconstructions.

Lesson 3 • Fire and Explosion Debris Analysis

It teaches extraction and identification of ignitable liquid residues from fire scenes. Results support arson determination and link suspects to accelerant use.

Lesson 4 • Controlled Substance Identification

It introduces colour tests, microscopy, and instrumental methods for drug identification. Accurate identification is required before charges related to controlled substances can proceed.

Lesson 1 • Expert Testimony and Courtroom Presentation

It prepares you to present reconstruction findings clearly to judges and juries. Effective testimony requires translating technical conclusions into accessible, accurate language.

Lesson 2 • Bloodstain Pattern Reconstruction

It applies advanced pattern analysis to determine movement, impact events, and victim position. Reconstruction conclusions must be supported by multiple independent evidence types.

Lesson 3 • Integrating Multi-Discipline Evidence

It teaches how to combine DNA, fingerprint, toxicology, and physical evidence into a unified case theory. Conflicting findings must be reconciled or acknowledged in the final report.

Lesson 4 • Principles of Crime Scene Reconstruction

It defines reconstruction as a scientific process of event sequencing from physical evidence. You will apply inductive and deductive reasoning to build defensible event timelines.