How do you measure a crime scene?

The Forensic Services Section currently utilizes two different methods for measuring crime scenes; the Linear Coordinate (or Baseline Method) and Triangulation. A variation of the Baseline Method, which is known as the 90 Degree Method, is typically used for indoor scenes.

How do you measure at a crime scene quizlet?

The evidence is measured from each point. A crime scene evidence measuring method wherein a fixed point is created with a stake and evidence is measured from that point and the compass is used to determine the angle from North. GPS is also used with this method.

What do the numbers mean in a crime scene?

Evidence identification markers are items that are used to mark and illustrate items of evidence at a crime scene. These are commercial products like plastic alpha-numeric stands, markers, cones, and flags. … They are used to reveal evidence which may not be seen in photographs.

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What are the three methods of documenting a crime scene?

The three most common methods of recording a crime scene are: note taking, sketching, and photography. A detailed record of the crime scene and of the actions taken during the search of it, help the crime scene specialist to accurately recall events and to identify items of evidence later in a court of law.

What are the four types of crime scene sketches?

There are 4 main types of sketches: floor plan, elevation drawing, exploded view, and perspective drawings. Each type has its own limitations and are used when called upon (because of the scene).

What are the 4 search patterns for crime scenes?

Types of Crime Scene Searches

Common search patterns include the spiral, strip/line, grid, zone/quadrant, and pie/ wheel.

What are the 3 parts of a crime scene sketch?

Terms in this set (11)

  • Heading: notation that indicates why the sketch was created. …
  • Diagram area: the drawing itself. …
  • Legend: tells the viewer what the various labels used in the diagram depict.
  • Title block: provides important info relevant to the location of the scene and the creator of the sketch.

How do you fake a crime scene?

7 ways to create a fake crime scene in your home

  1. Crime scene tape. Seal off a staging area in one corner of your room or use it to restrict access to those messy rooms in your house you’d rather your guests didn’t see. …
  2. Chalk outline. …
  3. Bloody handprints. …
  4. Evidence markers. …
  5. Footprints. …
  6. Signs of a struggle. …
  7. Police presence.
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What is required on a crime scene sketch?

A crime scene sketch depicts the overall layout of a location and the relationship of evidentiary items to the surroundings. It can show the path a suspect or victim took and the distances involved. It can be used when questioning suspects and witnesses.

What are the yellow numbers in a crime scene?

Photo evidence letters are used in crime scene photographs to indicate where each piece of evidence is found. Usually two photographs are taken of each scene: one with photo evidence markers and one without. The markers are 7 1/4″ x 4 1/2″ heavy yellow plastic with a matte finish and black numbers.

Why do police put up blue tents?

Protecting The Scene

The police may also erect tents or tarpaulins to minimise the view of a crime scene to both press and public and also so that a police doctor or pathologist can carry out a cursory examination of a corpse before it is moved for autopsy.

What information can a sketch give that a photo does not?

Sketches can combine the best features of crime scene notes and photography. They should include the date and time; scale; reference points; distance measurements; the names of investigators, victims, and suspects; and a legend.

What is the golden rule of crime scene investigation?

The Golden Rule in Criminal Investigation. “ Do not touch, alter, move, or transfer any object at the crime scene unless it is properly marked, measured, sketched and/or photographed .”

What are five examples of evidence that can be collected at a crime scene?

Crime scene investigators collect evidence such as fingerprints, footprints, tire tracks, blood and other body fluids, hairs, fibers and fire debris.

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What are the 3 phases of criminal investigation?

Applied to the criminal realm, a criminal investigation refers to the process of collecting information (or evidence) about a crime in order to: (1) determine if a crime has been committed; (2) identify the perpetrator; (3) apprehend the perpetrator; and (4) provide evidence to support a conviction in court.