One of the most common types of paint examined in the crime laboratory involves finishes emanating from automobiles. Automobile manufacturers normally apply a variety of coatings to the body of an automobile.
Which of the following are the most common incidents that involve paint evidence in the crime lab?
In what types of criminal cases is paint evidence most frequently encountered? Hit-and-run and burglary cases.
What is the most important physical property of paint evidence for comparison purposes?
34 Cards in this Set
|The _ component of paint is commonly a mixture of inorganic and organic compounds and imparts color and hiding (or opacity).||pigment|
|In forensic comparison the most important physical property of paint is _.||layer structure|
What is the most distinctive forensic characteristic of paint?
Microscopic Examination of Paint
- The microscope is the most important instrument for locating and comparing paint specimens.
- Color is the most distinctive forensic characteristic of paint.
- An examiner observes color layers and tries to match the number and sequence of colors.
Which characteristic is most important in evaluating the significance of paint evidence?
Which of these characteristics is most important in evaluating the significance of paint evidence? Color, surface texture, and color layer texture. Color Layer Sequence is the most important.
What are 3 crimes where paint is scene as evidence?
Paint evidence occurs as transfers in a variety of crimes, including vehicular hit-and-runs, assaults, and burglaries. Types of paint evidence that is usually encountered include automotive, architectural, and maintenance paints. Paint analysis can also include other coatings and polymers.
What are the five major types of trace evidence?
Although the types of materials that might be used as trace evidence are nearly unlimited, hairs, fibers, paint, glass, and soil are the most common types analyzed in the microscopy laboratory.
What type of evidence is paint and why?
Like glass, fibers, and hair, paint is considered to be trace evidence. In other words, it is evidence that is transferred from a main source to the scene of a crime.
How do you analyze a paint chip?
The paint chips obtained from vehicles involved in road accidents contain vital evidence for solving criminal cases. Paint traces can be transferred from a vehicles to other materials or surfaces like the clothes of the victim. These traces can be matched with the type of paint of the vehicle using IR analysis.
Why is it important to protect the edges of the paint sample?
For a car crash scene, paint samples from the point of contact would be photographed, collected and stored in such a way as to protect the edges for further examination. This is particularly important when examining for fracture matches.
What is the most unique characteristic of paint?
Following are the Characteristics of a good paint: (i) It should have a good body or spreading power. (ii) It should work smoothly and freely and be capable of being laid in a thin coat with the brush. (iii) It should form durable, tough and resistant to wear film on drying.
What does the examination of paint usually involve?
The examination of paint usually involves the comparison of paint from the crime scene with a sample of paint that has been taken from a known source. Hit and Run- Paint from the victim’s clothing and paint from the suspect’s car.
Which paint layer hides imperfections?
Matte finish will hide the most damage; look for flat paint and buy a quality brand with good coverage to even out slight imperfections on the walls. Low-luster finishes minimize flaws on the surface of the walls — these are branded eggshell and satin finish, and they have very little shine.
Which subject area is most important for criminalists?
Physics is the correct answer.
Why is trace evidence so important?
Trace evidence is created when objects make contact. The material is often transferred by heat or induced by contact friction. … Trace evidence is important in accident investigation, where the movement of one part against another will often leave a tell-tale mark. Such analysis is of great use in forensic engineering.
What is 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.