Sharon Plotkin Crime Scene Investigation & Reconstruction -

This guide synthesizes the core principles taught by Sharon Plotkin (a renowned forensic expert and educator), emphasizing her focus on the "science of the scene," procedural rigor, and the nexus between evidence collection and case theory.

Course Guide: Advanced Crime Scene Investigation & Reconstruction Instructor/Methodology Reference: Sharon Plotkin Focus: Forensic Excellence, Procedural Integrity, and Analytical Reconstruction I. Course Philosophy & Objectives Sharon Plotkin’s approach centers on the idea that a crime scene is a silent witness that must be interviewed with the same rigor as a human subject. The goal is not just to collect evidence, but to preserve the context of that evidence so that a logical reconstruction of events can occur later in the lab or courtroom. Core Objectives:

Enhance Observational Skills: Moving beyond the obvious to identify macro and micro evidence. Master Documentation: Utilizing photography, sketching, and notes to create a permanent, defensible record. Understand Reconstruction Theory: Learning how static evidence translates into dynamic event sequences.

II. Module 1: The Science of Observation Before evidence is touched, it must be understood. A. Locard’s Exchange Principle in Practice sharon plotkin crime scene investigation & reconstruction

Concept: Every contact leaves a trace. Application: Investigators must assume the perpetrator has left something behind and taken something away. This mindset drives the search for trace evidence (fibers, DNA, latent prints) in unlikely places.

B. The "Forensic Mindset"

Bias Mitigation: Understanding the difference between contextual bias (knowing details of the crime beforehand) and confirmation bias (looking only for evidence that supports a theory). The Walk-Through: Conducting a preliminary survey to establish a path of entry/exit without contaminating the scene. This guide synthesizes the core principles taught by

III. Module 2: Methodical Documentation If it isn’t documented, it didn’t happen. This is the backbone of the Plotkin methodology. A. Crime Scene Photography

The Three-Tier Approach:

Overall/Establishment Shots: Wide-angle photos showing the scene in relation to the environment (e.g., the house on the street, the room in the house). Mid-Range/Relationship Shots: Showing how evidence relates to other fixed objects (e.g., a weapon relative to a doorway). Close-up/Examination Shots: Filling the frame with the evidence, including a scale (ruler) and an identifier (placard). The goal is not just to collect evidence,

Key Rule: Photos must be taken before any evidence is moved or altered.

B. Sketching and Mapping