Category Archives: Crime Scene Investigation

Footwear, the Missed Evidence

Dwayne S. Hilderbrand, CLPE
Lead Latent Print Examiner
Scottsdale Police Crime Lab

This article originally appeared in Minutiae, The Lightning Powder Co. Newsletter, Nov-Dec 1995, p. 2-5, 11.

“The scope of a complete examination consists of two main functions: first,
the recovery process, which includes the discovery and preservation of the
prints, and second, the identification process, which involves evaluations,
comparisons, and findings related to the recovered impression.”

(Grieve 1988).

Introduction

“Wherever he steps, whatever he touches, whatever he leaves, even
unconsciously, will serve as silent witness against him. Not only his
fingerprints or his footprints, but his hair, the fibers from his clothing,
the glass he breaks, the tool mark he leaves, the paint he scratches, the
blood or semen he deposits or collects.. All of these and more bear mute
witness against him. This is evidence that does not forget. It is not confused
by the excitement of the moment. It is not absent because human witnesses
are, it is factual evidence, physical evidence cannot be wrong, it cannot
perjure itself; it cannot be wholly absent, only its interpretation can err.
Only human failure to find it, study and understand it, can diminish its
value.”

(Paul L. Kirk 1974).

On September 19, 1991, two German tourists were hiking in the mountains on the border between Austria and Italy when they spotted a body buried in the ice. The two tourists, suspecting foul play, contacted the authorities. As it was not clear at the time exactly where the body was found, police authorities from Austria and Italy responded. Following the normal procedures for the recovery of the body, they attempted to free it from the ice using jack hammers. Unfortunately, the jack hammers were damaging the body, pickaxes and ski poles were then used.

Continue reading

Ear Identification

Presented at the conference for Shoeprint and Toolmark Examiners Noordwijkerhout, 24 April 1997.

Introduction:
The subject of my presentation for this conference is ear research / ear identification. It concerns not only the research into the adversity of ears but also the finding of earprints especially in relation to committed penal acts. My further reasoning will be separated into four parts.

1. A piece of history according to ear research and what is known about that subject in literature.

2. The history of ear research in the Netherlands in which I will indicate the present state of affairs.

3. International developments (as far as I’m concerned).

4. The criminological value of earprints in the future, especially my views on the internationalization of earprint research, standard norms and co-operation. Continue reading

Burglary Investigations

By Daryl W. Clemens

Burglary defined

Burglary is sometimes also known as Home Invasion, or Breaking and Entering. The unlawful entry into the premises of another with intent to commit a felony (usually larceny) therein.

Introduction

Burglaries represent one of the more common crimes to which patrol officers respond. Someone has returned home from an evening out and found the doors open and their property missing. The police are called, and an investigation is begun. Continue reading

Arson Investigation

Written by Katherine Steck-Flynn

The Fire

Arson investigation starts with the fire itself. To create and sustain a fire three factors must be present. The three factors are known as the fire triangle (Peige ed., 1977). The fire triangle consists of oxygen, a fuel source, and heat. In most cases the percentage of oxygen concentration must be above 16% (Peige, ed., 1977). The fuel may be any flammable substance. The heat source needs only to match the ignition temperature of the fuel.

In a fire involving arson the arsonist will have tampered with one or more of the factors in the fire triangle. The arsonist may increase the fuel load by introducing flammable material or by adding accelerants such as kerosene, gasoline or alcohol (French, 1979) The arsonist may increase the oxygen content of a structure by opening windows or punching holes in ceilings and walls (French, 1979) Fire will follow the highest concentration of oxygen to its source. By ventilating a structure at the top and starting a fire at the bottom of the structure an arsonist can cause the fire to race upward through the structure. The fire will rapidly involve the whole structure rather than be confined to one room. Continue reading