[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-664091-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-664091-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","crime-scene-sketch-activity-instruction-guide","Crime Scene Sketch Activity - Instruction Guide","","Crime scene sketch activity explains how investigators use hand-drawn diagrams to document locations and the spatial relationship of evidentiary items. It covers why sketches supplement photographs and notes, how they support suspect and witness questioning, and how diagrams correlate testimony during trial. 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It depicts layout and the relationship of evidentiary items to the surroundings, helping correlate testimony and provide orientation points during trial.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How do you decide between a to-scale and not-to-scale diagram?",{"text":67,"@type":63},"Use drawn-to-scale diagrams to avoid distortion by reducing measurements proportionally and selecting a suitable scale, often with graph paper. Choose not-to-scale diagrams for faster sketching, while marking them clearly and accepting that proportions may be distorted.",{"name":69,"@type":60,"acceptedAnswer":70},"What measurements are required to locate objects on a sketch?",{"text":71,"@type":63},"For a two-dimensional sketch, each point requires two measurements. 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It is a permanent record that provides supplemental information that is not easily accomplished with the exclusive use of crime scene photographs and notes. A crime scene sketch depicts the overall layout of a location and the relationship of evidentiary items to the surroundings.  \nIt can show the path a suspect or victim took and the distances involved. It can be used when questioning suspects and witnesses. During trial, the crime scene diagram correlates the testimony of witnesses and serves as a tool for relaying reference and orientation points to the prosecutor, judge and jury.  \nI. Sketching the Crime Scene  \nBefore beginning a sketch, obtain a comprehensive view of the scene. Determine the sketch limits – decide what to include and what to exclude. If the scene is complicated, a number of sketches may be necessary for adequate documentation.  \nTypes of Sketches (see third page for examples)  \nA. Overview sketch – consists of a bird’s-eye-view or floor plan sketch of the scene. This is the most common type of sketch and consists of items on the horizontal plane.  \nB. Elevation sketch – portrays a vertical plane rather thana horizontal plane. Examples include bloodstain patterns on vertical surfaces such as walls or cabinetryand bullet holes through windows.  \nC. Exploded view or cross-projection sketch – consists of a combination of the first two sketches. It is similar to a floor plan except the walls have been laid out flat and objects on them have been shown in their relative positions.  \nD. Perspective sketch – depicts the scene or item of interest in three dimensions. It is the most difficult sketch to create and requires some artistic skill.  \nTo Scale or Not to Scale  \nA. \"Drawn to Scale”diagrams  \n1. To avoid a distorted view of the scene, measurements must be reduced in proportion so that they bear correct relationship to each other.  \n2. Select the scale of the diagram by fitting the longest dimension in the scene to the area of the paper being used.  \n3. Graph paper should be used when creating this type of sketch. Each block represents a specified length of measurement. Use convenient units for the scale (one block = 1 foot) .  \nB.“Not to Scale”diagrams  \n1. Sketch can be accomplished more quickly than a scaled diagram.  \n2. Items are placed in the diagram based on approximation. This type of diagram may provide a distorted view of the scene. Correct proportions and relationships between objects may not be maintained.  \n3. Measurements are recorded on the sketch or in a chart.  \n4. This rough sketch may be used to complete a scaled diagram later.  \n5. These diagrams should be clearly marked Not to Scale.  \nEquipment  \nA. Supply of writing implements – pencils may be used for the overall sketch. A sketcher may choose to use red pencils to denote bloodstains, and highlighters or other colored pencils to mark different types of evidence on the sketch. A sketch created in pencil will need to be preserved in some permanent manner as soon as possible. A good method of doing this is to photocopy the finished sketch and include the photocopy with the original.  \nB. Blank paper– graph paper, while not essential, simplifies scale drawing.  \nC. Drawing surface such as a clipboard.  \nD. Measuring devices – tape measures are the most common tool used and should be at least 50 to 100 feet long. Other measuring devices may include a surveyor’s wheel, a laser rangefinder, or a Total Station. GPS coordinates may be useful in locating an outdoor scene.  \nE. Ruler for drawing straight lines, drawing to scale, and making very short measurements.  \nF. Magnetic compass to determine true north.  \nCreating the Sketch  \nA. If the scene is large, make a very rough sketch of the area while obtaining an over-all view of the scene. This initial rough sketch serves as a reference when making more complete sketches. Enlarged sections of this ","cbCaidcigMI6PRFB","https://ap.wps.com/l/cbCaidcigMI6PRFB","pdf",768121,"English","# Sketching the Crime Scene\n## Types of Sketches\n# To Scale or Not to Scale\n## Drawn to Scale diagrams\n## Not to Scale diagrams\n# Equipment\n# Creating the Sketch\n## Measurements\n# Locating Objects on a Sketch\n# Illustrating the Sketch\n# Labeling the Sketch","[{\"question\":\"What is the purpose of a crime scene sketch?\",\"answer\":\"A crime scene sketch records investigative data as a permanent supplement to photographs and notes. It depicts layout and the relationship of evidentiary items to the surroundings, helping correlate testimony and provide orientation points during trial.\"},{\"question\":\"How do you decide between a to-scale and not-to-scale diagram?\",\"answer\":\"Use drawn-to-scale diagrams to avoid distortion by reducing measurements proportionally and selecting a suitable scale, often with graph paper. Choose not-to-scale diagrams for faster sketching, while marking them clearly and accepting that proportions may be distorted.\"},{\"question\":\"What measurements are required to locate objects on a sketch?\",\"answer\":\"For a two-dimensional sketch, each point requires two measurements. For a perspective (3-D) sketch, three measurements are required to define location accurately.\"}]","Crime Scene Sketch Activity - Instruction Guide | PDF"]