What is the most important thing to include in a photo of impression evidence?

What is the most important step when taking photos of impression evidence?

However, it is always best to “preview the photograph” by looking at lighting from several different angles as well as the result of ambient light. To do this, position a strong light source, such as a powerful flashlight, at different angles to find the light angles that show the best detail in the impression.

What is included in Impression evidence?

Impression evidence is created when two objects come in contact with enough force to cause an “impression.” Typically impression evidence is either two-dimensional — such as a fingerprint — or three-dimensional — such as the marks on a bullet caused by the barrel of a firearm.

What is the importance of evidence in photography?

They are most useful in supplying significant bits and pieces with exact measurement of the site and evidence where the crime has occurred. The purpose of crime scene photography is to provide a true and accurate record of the crime scene and physical evidence present by recording the original scene and related areas.

Why is impression evidence important?

As a significant form of physical evidence, impressions left behind at the crime scene may provide valuable information on where the crime occurred and the direction the suspect traveled while committing the crime. This information may place the suspect at the crime scene or eliminate the suspect as having been there.

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How do you take photos of evidence?

Photographing the evidence: Photographs should be taken directly at right angles, eliminating probable distance distortions for clear visualization and each part of evidence should be photographed with scale to signify size and without scale to show relationship with overall scene.

What are examples of impression evidence?

The major types of impression evidence are shoeprints, tire tracks , tool marks and the marks that are found on a fired bullet. Impressions can be found in a variety of surfaces including dust, carpet, mud, and, very significantly, blood .

What are 3 categories of impressions?

Impressions fall into three basic categories: patent, latent, and plastic. Plastic impressions are three-dimensional imprints. These impressions can be left in soft materials such as snow, mud, soil, or soap.

Why are photographs taken before any evidence is moved?

Evidence markers: Photographs should be taken before evidence markers are placed, then again after. These initial shots are important to prove that no one has tampered with the crime scene. … These photos should include the entire piece of evidence and a scale to indicate size.