Introduction to Forensics Crime Investigation

<p>Creating contrast through fluorescence of the fingermark (D)</p> Signup and view all the answers

<p>Magnetic powder dusting - utilizes liquid mediums (A)</p> Signup and view all the answers

<p>To control access and preserve the scene (B)</p> Signup and view all the answers

<p>Apprehend suspects immediately (C)</p> Signup and view all the answers

<p>Forensic investigators only (C)</p> Signup and view all the answers

<p>Preserve continuity of evidence (D)</p> Signup and view all the answers

<p>Obtaining witness information (C)</p> Signup and view all the answers

<p>To prevent public interference with evidence (A)</p> Signup and view all the answers

<p>Set up cordons to secure the area (A)</p> Signup and view all the answers

<p>Keeping the evidence unchanged from arrival to analysis (A)</p> Signup and view all the answers

<p>Simple liquid chromatography techniques (A)</p> Signup and view all the answers

<p>Visible analysis (D)</p> Signup and view all the answers

<p>Even force and pressure applied (C)</p> Signup and view all the answers

<p>Infrared reflection (C)</p> Signup and view all the answers

<p>They fluoresce in the infrared region (B)</p> Signup and view all the answers

<p>Ultraviolet fluorescence (B)</p> Signup and view all the answers

<p>Comparative handwriting analysis (C)</p> Signup and view all the answers

<p>Alterations made to the text (C)</p> Signup and view all the answers

<p>It may degrade biological material. (B)</p> Signup and view all the answers

<p>It allows for real time imaging outside the visible spectrum. (C)</p> Signup and view all the answers

<p>Long wave infrared reflection. (A)</p> Signup and view all the answers

<p>Voice recognition data. (A)</p> Signup and view all the answers

<p>8.3 million. (C)</p> Signup and view all the answers

<p>They can only be removed in special circumstances after charges. (A)</p> Signup and view all the answers

<p>38,179. (C)</p> Signup and view all the answers

<p>85,000. (A)</p> Signup and view all the answers

<p>To protect the evidence from contamination (B)</p> Signup and view all the answers

<p>To determine the type of paper used (C)</p> Signup and view all the answers

<p>Superficial writing (D)</p> Signup and view all the answers

<p>Indentation detection (C)</p> Signup and view all the answers

<p>The idea that every interaction leaves a trace (C)</p> Signup and view all the answers

<p>Financial statements and legal contracts (C)</p> Signup and view all the answers

<p>Microphone recorders (D)</p> Signup and view all the answers

<p>The psychological profile of the writer (C)</p> Signup and view all the answers

<p>To ensure a comprehensive visual record of the scene (C)</p> Signup and view all the answers

<p>Photographs must be taken at a low angle (A)</p> Signup and view all the answers

<p>500 DPI (D)</p> Signup and view all the answers

<p>To avoid potential lens distortion (B)</p> Signup and view all the answers

<p>Case number and scale (C)</p> Signup and view all the answers

<p>The quality of the image may be compromised (B)</p> Signup and view all the answers

<p>Using a tripod or stabilization techniques (C)</p> Signup and view all the answers

<p>To provide context of the exhibit in its surroundings (D)</p> Signup and view all the answers

The first actions taken at a crime scene, including ensuring the safety of everyone involved, safeguarding evidence, and apprehending the suspect.

A type of crime that involves a large number of victims or incidents, often with a recurring pattern or method.

A quick assessment of potential hazards and risks at a crime scene, considering the environment, biological dangers, and chemical substances.

A physical barrier set up around a crime scene to restrict access and preserve evidence. It's divided into inner and outer layers, with different levels of security.

The inner layer of a crime scene cordon, where investigators work directly with the evidence.

The outer layer of a crime scene cordon, managed by police officers to prevent unauthorized entry and ensure safety.

The purpose of a crime scene cordon is to: control access, preserve evidence, and ensure everyone's safety.

The actions taken to preserve a crime scene, including maintaining the integrity of evidence, ensuring safety, and minimizing contamination.

A photograph taken from a distance to show the overall scene and the location of the exhibit in relation to its surroundings.

A photograph taken from a closer distance to show the exhibit and its immediate surroundings.

A photograph taken up-close to show the exhibit in detail, often with a measurement scale to provide accurate dimensions.

A rule that emphasizes the importance of documenting a crime scene with a comprehensive set of photographs. These include long range, medium range, and close up shots.

A photograph taken before the scene is altered to showcase the original state of the evidence.

A photograph taken after the addition of a measurement scale to provide a sense of size and proportion.

A photograph taken after the collection of evidence to document the location where the evidence was found.

The ability of a camera lens to capture a wide range of objects in focus, from near to far.

A chemical process where fingermark residue reacts with a reagent to form a colored compound, making the print visible.

Fingermarks contain substances that can speed up chemical reactions. This is used in techniques like superglue fuming, where a vapor reacts with the mark to solidify.

The choice of how to develop a fingerprint depends on the surface and the composition of the mark. Some methods work better on smooth surfaces, while others are good for porous materials.

Techniques like oblique lighting and dark field illumination use light in specific ways to create contrast between the fingerprint and the background, making the mark easier to see.

Filters can enhance the visibility of fingerprints by absorbing certain wavelengths of light, which can allow the mark to stand out more.

Examining the chemical composition of ink to differentiate between inks that visually appear similar.

Analyzing the physical properties of paper, like weight and how easily it absorbs liquids, to determine its type and origin.

Analyzing the fillers added to paper with advanced techniques like microscopy to identify their type and origin.

Comparing known handwriting samples to a questioned document to determine if they were written by the same person.

Detecting changes made to a document by examining how different inks react to various wavelengths of light.

Using infrared light to reveal overwritten or erased text by highlighting differences in ink properties.

Analyzing a document under ultraviolet light to reveal erased or faded writing, as erasures often leave traces.

Analyzing handwriting for specific characteristics that might reveal information about the writer's personality or habit (e.g., writing speed, pressure applied).

A fundamental principle in forensics stating that every contact leaves a trace, meaning that any interaction with a crime scene will leave evidence.

Protective gear worn to ensure the safety of the forensic investigator and the integrity of the crime scene.

Any material containing information, including written, printed, or digital forms. Paper documents, messages, or even markings on walls can be considered documents.

Involves examining a document to determine its authenticity, the writer, any alterations, or hidden messages.

The visible aspects of a document, such as the writing, printing, or typing.

The deeper aspects of a document, such as the identity of the writer, the source of the printing, or any alterations made.

Analysis of a document to determine if it has been tampered with, including additions, erasures, or obliterations.

Determining the order in which multiple document elements were created, to understand the sequence of events.

A specialized type of light used in forensics to make certain substances glow, making them visible.

A method used to reveal fingerprints by taking advantage of how light reflects off different surfaces.

Using lasers or LEDs to illuminate crime scenes and find trace evidence.

Digital images have revolutionized forensic work, offering real-time viewing, processing, and enhanced detail.

A massive database containing fingerprints, palm prints, and crime scene marks collected from individuals.

The process of comparing fingerprints found at a crime scene to those in the database.

When DNA and a mugshot are taken from every arrested person in England, Scotland and Wales.

Fingerprints are only removed from the database in special circumstances, but Scotland removes records on acquittal.