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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 exhaus

Check under the Hood

August 26, 2014 8:34 am | Comments

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.

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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.

The Prepared CSO

August 21, 2014 4:25 pm | Comments

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.

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Considerations of Gait at Crime Scenes

August 20, 2014 8:22 am | by Bryan B. Kagan, DPM and Sally Crawford | Comments

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.  

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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 th

Employees' Three Flavors

August 19, 2014 8:51 am | Comments

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. 

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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 o

Crime Scene Measuring Basics

August 15, 2014 9:19 am | Comments

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.

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Gunshot Residue Collection: The Decisions that Make or Break a Case

August 13, 2014 8:20 am | by Julia Patterson | RJ Lee Group, Inc. | Comments

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.  

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Don't Become Complacent About Safety

August 12, 2014 8:48 am | Comments

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.

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The Scene Will Dictate What You Need From the Suspect

August 7, 2014 8:00 pm | Comments

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. 

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Confirming Torture: The Use of Imaging in Victims of Falanga

August 6, 2014 9:54 am | by Christine Miller, Jessica Popelka, and Nicole Griffin | Comments

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.

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Infographic: PPE Basics

August 4, 2014 7:29 am | Comments

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.             

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Collecting Patent Prints

July 31, 2014 3:49 pm | Comments

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.           

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Applying AFIS Case by Case

July 30, 2014 8:15 am | by Carey Hall and Teresa Wu | Comments

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.

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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 mater

Workplace Safety: Planning and Staffing

July 29, 2014 2:28 pm | Comments

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.

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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 l

Trouble with Controled Substances

July 25, 2014 9:06 am | Comments

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.

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To say that developments in “Rapid DNA” have been progressing quickly is an understatement. From a front page USA Today article headline reading “Rapid DNA Test Could Transform Crime Fight”, to its first use in a criminal prosecution and, most importantly

"Rapid" Progess

July 23, 2014 8:33 am | by Chris Asplen | Comments

To say that developments in “Rapid DNA” have been progressing quickly is an understatement. From a front page USA Today article headline reading “Rapid DNA Test Could Transform Crime Fight”, to its first use in a criminal prosecution and, most importantly, approval from the FBI to upload reference profiles to the NDIS, the moniker “Rapid” applies more to its rate of implementation than to its DNA analysis time.  

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