THE CRIME SCENE SKETCH The crime scene sketch: Accurately portrays the physical facts Relates the sequence of events at the scene Establishes the precise location and relationship of objects and evidence at the scene Creates a mental picture of the scene for those not

present Is a permanent record of the scene INTRODUCTION A crime scene sketch assists in: Interviewing and interrogating persons Preparing an investigative report Presenting the case in court

The sketch supplements photographs, notes, plaster casts and other investigative techniques. Two types of sketches Rough sketch Finished or scale sketch OVERVIEW The rough sketch is the first pencil-drawn outline of the scene and the location of objects and evidence within this outline.

Usually not drawn to scale Although distances are measured and indicated in the sketch Sketch after photographs are taken and before anything is moved. Sketch as much as possible. THE ROUGH SKETCH Paper

Pencil Measuring tape Ruler Clipboard Eraser

Compass (maybe) SKETCHING MATERIALS Observe and plan Measure distances Outline the area Locate objects and evidence within the outline Record details

Make notes Identify the sketch with a legend and a scale STEPS IN SKETCHING THE CRIME SCENE A steel tape measurer is best It doesnt stretch making it more accurate Use conventional units of measurement

Inches Feet Centimeters Meters MEASURE AND OUTLINE AREA North should be at the top of the paper.

Determine Scale Take the longest measurement at the scene and divide it by the longest measurement of the paper used for sketching. Common scales: = 1 small rooms = 1 large rooms 1/8 = 1 very large rooms

= 10 large buildings 1/8 = 10 large land area MEASURE AND OUTLINE AREA (CONT) Measure from fixed locations Walls Trees

Telephone poles Corners Curbs Outlets Any Immovable Object MEASURE AND OUTLINE AREA (CONT) Plotting

methods are used to locate objects and evidence on the sketch. They include the use of: Rectangular coordinates A baseline Triangulation Compass points.

PLOT OBJECTS AND EVIDENCE Uses two adjacent walls as fixed points as distances are measured at right angles RECTANGULAR COORDINATES Run a baseline from one fixed point to another, from which measurements are taken at right angles. BASELINE METHOD Common in outdoor scenes Uses straight-line measurements from two fixed

objects to the evidence to create a triangle with evidence in the angle formed by two straight lines. TRIANGULATION Uses a protractor to measure the angle formed by two lines COMPASS POINT METHOD Presents floors and walls as the were on one surface. CROSS-PROJECTION METHOD Contains: Case number

Investigator Type of crime Persons assisting Victims name Sketchers name Location Direction of North Date, time

Identifying information in sketch - Key Scale MAKE A LEGEND

Recently Viewed Presentations

  • Registering for SAM 2013 Baylor University (Institution Key:T2031171)

    Registering for SAM 2013 Baylor University (Institution Key:T2031171)

    Logging into SAM 2013. For new SAM 2013 users: Click the . New User . button and follow the on-screen prompts to create yourSAM 2013 account. New users can also click on . Watch a video . to see step-by-step...
  • Moving to Use Cases

    Moving to Use Cases

    (Discuss!) DFDs and ERDs are useful for moving into Design (procedural and database) and implementation But can hold little meaning to users Prototypes obscure the real requirements and seem to emphasize the interface at the expense of the real application's...
  • Strengths of Orem's Theory

    Strengths of Orem's Theory

    Self-Care Deficit Nursing Theory " Early on, Orem recognized that if nursing was to advance as a field of knowledge and as a field of practice, a structured, organized body of nursing knowledge was needed" (Alligood, 2010, p. 266). Orem...
  • Critical Periods for Birth Defects Mrs. Hodgson Birth

    Critical Periods for Birth Defects Mrs. Hodgson Birth

    Later, during the fetal stage, the environment provided by the mother affects the baby's size, behaviour, intelligence and health, rather than the formation of organs and limbs (Bernstein and Nash, 1999, p. 333). Agents that cause congenital malformations in critical...
  • Chapter 6 Electrostatic Boundary-Value Problems

    Chapter 6 Electrostatic Boundary-Value Problems

    ECE 305 Electromagnetic Theory. Qiliang Li. Dept. of Electrical and Computer Engineering, George Mason University, Fairfax, VA. Chapter 6 Electrostatic Boundary-Value Problems
  • Deaf and Hard of Hearing Children

    Deaf and Hard of Hearing Children

    Preschool Language Scales (PLS-5)* Elementary & up (in addition to tests above, as appropriate) Oral and Written Language Scales (OWLS)* Comprehensive Evaluation of Language Fundamentals (CELF-5)* Use a big disclaimer! And use standardized scores with EXTREME caution - or don't...
  • 1. Who, referring to what? Everyone is praising

    1. Who, referring to what? Everyone is praising

    The name of the detector is a playful pun, which was bestowed upon it by Fred Reines, one of the scientists working on the project, the joke being that one would have to be on drugs to believe the _____...
  • The Clark Fisher model - Ning

    The Clark Fisher model - Ning

    Task 1: Evolving Planet pg 183 - Take notes on the following stages of the Clark Fisher model. Pre-Industrial Stage Industrial Stage Post-Industrial Stage **Growth of the quarternary sector The Clark Fisher model Task 2: Stick a copy of the...