SSDs have been in use since the 1950s. When compared to a conventional HDD, they are totally different in architecture and functionality. These differences offer many advantages such as no moving parts, having low random access times, and being shock and vibration resistant. However, their architecture and functionality creates some difficult issues to deal with pertaining to their forensic analysis.
Chemical fume hoods are designed to capture and exhaust contaminates resulting from working with chemicals. Their design attempts to create a capture zone in front of the hood, draw contaminates away from the worker and into the hood where they are exhausted.
Changes in science and technology mean more tools for crime scene investigation. To take advantage of these advances, you have to be knowledgeable about the latest developments and about the capabilities of experts; you also need the right equipment.
Forensic gait analysis is the identification of gait features and patterns of subjects seen on Closed Circuit Television (CCTV) and from footprints forming a gait pattern left at the scene of a crime. Studies have shown that more than 30% of people wear shoes that are within a two shoe size differential, which can affect the gait phase and gait time parameters and impact on the class level distinction during forensic examination.
Like a workplace Neapolitan ice cream, employees typically come in three distinct “flavors”: your Critical People, the Squeaky Wheels and the Fat Middle. Most managers and supervisors either attempt to manage every employee from each of these groups in the same manner. Or worse, they spend the majority of time with their Squeaky Wheels – rewarding bad performance or behavior.
There are four basic techniques that can be used to measure a scene; rectangular/ coordinate system, baseline/ station line, triangulation/ trilateration, and azimuth/ polar coordinates. Regardless of which measurement method you use, they are all based on having known starting points.
Gunshot residue (GSR) analysis can be a critical piece of evidence in criminal investigations, but over the last several years many government laboratories have discontinued GSR analysis due to a lack of funding or re-prioritization. By understanding the science behind GSR and what can be learned from its analysis, investigators can make informed decisions regarding the collection of gunshot residue evidence.
It’s human nature to become complacent and relaxed in a familiar and comfortable setting. Take a walk through your lab, looking with unprejudiced honesty at all you see. Reevaluate the safety equipment and procedures in your lab and make sure you are not becoming complacent about safety.
Our primary job as crime scene investigators is always the same: to tie a suspect to the scene. The way to accomplish this goal is to collect as much evidence as possible from the scene and the suspect. The key point to keep in mind is that the scene will dictate what you need from the suspect.
Torture victims experience persistent pain and gait abnormalities. There is still a lack of data regarding the diagnostic value of imaging. For agencies who lend aid to these victims, documentation and proof of torture are pivotal. Especially in cases where victims seek help years after the torture occurred, the imaging modalities of bone scintigraphy, magnetic resonance imaging, and ultrasonography can be quite advantageous.
The Canadian Center for Occupational Health & Safety (CCOHS) created this useful infographic as a reminder of the basics of personal protective equipment (PPE) use to minimize exposure to hazards in the workplace.
Patent prints are readily visible because they contain a contaminant like blood or grease. Bloody or greasy prints left on walls or floors should be photographed, processed, and lifted at the scene if possible.
A typical AFIS deals with pre-defined print card formats and rigid parameters, a new “Case AFIS” approach is flexible in dealing with ad-hoc ink cards, uncontrolled capture areas, poor quality prints, and other obstacles. Using the new application would lead to more identifications and would be more efficient than the manual searching process.
In providing an effective safety and health program effective human resource management is critical. It includes development of accurate job descriptions to take into consideration job duties (such as respirator use or hearing protection use, manual material handling, exposure to allergens) that may trigger the need for pre-employment evaluations and medical surveillance.
Controlled substances are chemicals that have a legally recognized potential for abuse. They include “street drugs” such as heroin or ecstasy and prescription drugs such as oxycodone. Detecting and identifying controlled substances is a critical step in law enforcement's fight against drug-related crime and violence.