Category Archives: Article Abstract

Accuracy and Repeatability of the Laser Scanner and Total Station for Crime and Accident Scene Documentation

David Dustin & Eugene Liscio, P. Eng.
Abstract:  The need for quick and versatile scene documentation tools continues to be of great importance at both crime and accident scenes. What was once documented by hand has transitioned to the total station and, most recently, the laser scanner due to its ease of use and capacity to […]

A Technical Investigation Pertaining to the First Shot Fired in the JFK Assassination

Frank S. DeRonja, MS Engr & Max Holland
Abstract:  Following the 1963 assassination of President Kennedy, the Warren Commission established that one of the three shots fired in Dealey Plaza missed. By 1979, subsequent investigations determined that the first shot fired was the one that missed. Left unanswered was why the first shot missed and how […]

A Comparison of the Terrestrial Laser Scanner & Total Station for Scene Documentation

Eugene Liscio, Adam Hayden, & James Moody

Abstract: The use of the laser scanner for documentation at crime and collision scenes has grown significantly over the past ten years. Many law enforcement agencies and private firms who have traditionally used hand measurements or total stations have migrated over to the laser scanner because of the speed, […]

Visual Appearance and Chemical Detection of Bloodstains on Concrete After Exposure to the Elements

Sheri Shimamoto, Charles S. DeFrance, & Thomas W. Adair
Abstract: We report on the experimental detection of blood on exposed concrete over a period of 428 days in the city of Aurora, Colorado. Neat (undiluted) blood was poured in an x- shaped pattern in each grid unit. The x-shaped pattern was chosen as a means of validating any reaction […]

Preservation Methods and the Degradation of Dust Print Lifts

Marcy Hendricks
Abstract: In this study, the author examined the different types of physical preservation methods for dust print lifts. Dust impressions were collected with Kinderprint’s electrostatic dust print lifter and documented at one week intervals with examination quality photography. Results indicated that storing dust print lifts taped to the top of cardboard mailing boxes produced the least amount […]

An Introduction to Building 3D Crime Scene Models Using SketchUp

Elissa St. Clair, Andy Maloney, and Albert Schade III
Abstract:  Crime scene investigators generally have two options when they need to create a three-dimensional (3D) model of a crime scene: enlist the services of an expert 3D modeller who specializes in graphic modelling or learn one of the full-fledged modelling tools to create the model themselves. […]

The Survival of Neat and Cleaned Blood after the Application of Wallpaper

Ivanie Stene and Tom Adair, MS
Abstract:  We report on a study in which neat (undiluted) and cleaned bloodstains were covered with commercial wallpaper in order to test methods of discovery and recovery of said stains. Cleaned and camouflaged (covered) bloodstains pose significant challenges to the crime scene reconstructionist. Criminals may employ a variety of methods to destroy bloodstain […]

Aspects Influencing the Entomological Postmortem Interval in Crime Scene Reconstruction

Tom Adair, MS
Abstract:  The pathological postmortem interval (PMI), or time since death estimate, is widely understood among crime scene reconstructionists, pathologists, and prosecutors. Unlike the pathological PMI, the entomological PMI is not strictly an estimate of the time since death. This paper will discuss the entomological PMI and the environmental and cultural factors that may influence it.
Aspects Influencing […]

Identification of a Second Suspect via Stomach Contents at Autopsy

Identification of a Second Suspect via Stomach Contents at Autopsy 
Lisa Pope
Abstract: A case report describing the examination of stomach contents at the autopsy of a robber, who was shot and killed during the commission of his crime, which led to the identification of the second and outstanding robber. During autopsy, digested stomach contents gave the attending […]

Touch DNA: Forensic Collection and Application to Investigations

 Angela L. Williamson
Abstract:  Touch DNA refers to the DNA that is left behind from skin cells when a person touches or comes into contact with an item. However, since Touch DNA (also referred to as wearer or contact DNA) is invisible to the naked eye, and is usually deposited in smaller amounts than the DNA […]