#physicalevidence

Question- What is Crime Scene Sketch?

Answer- A crime scene sketch is a permanent record of the size and distance relationship of the crime scene and the physical evidence within it. The sketch serves to clarify the special information present within the photo-graphs and video documentation, because the other methods do not allow the viewer to easily gauge distances and dimensions. A sketch is the most simplistic manner in which to present crime scene layout and measurements. Photographer /camera positions may be noted within a sketch also.

Question- Why is a sketch important to crime scene documentation?

Answer- ■ It accurately portrays the physical facts.

■ It relates to the sequence of events at the scene.

■ It establishes the precise location and relationship of objects and evidence at the scene.

■ It helps to create a mental picture of the scene for those not present.

■ It is a permanent record of the scene.

■ It usually is admissible in court.

■ It assists in interviewing and interrogating.

■ It assists in preparing the written investigative report.

■ It assists in presenting the case in court. Well-prepared sketches and drawings help judges, juries, witnesses, and others to visualize the crime scene.

Question-When should sketches be made?

Answer- Sketch all serious crimes and accident scenes after photographs have been taken and before anything is moved.

Sketch the entire scene, the objects, and the evidence.

Question- How many types of sketches are made of crime scene?

Analysis of Fiber Colors and Dyes

➿ The vast majority of fibers used in commercial applications are colored.

➿ Fiber color is one of the most important properties in the comparison of fibers.

〽️ There are a variety of methods for characterizing the color of the dyes in the fibers. They fall into three major categories:

1.) Visual:The visual method is the simple observation and comparison of the fiber colors by use of the unaided eye. Visual comparison is easy, fast, accurate and non- destructive. It is a crucial first step in any fiber comparison, as many otherwise similar fibers can be excluded from consideration by color.

2.) Chemical:Chemical methods, which include thin layer chromatography and high performance liquid chromatography, address the make-up of the dyes used to color the fiber. (This latter statement is an important distinction: analyzing the color of a fiber is not the same as analyzing the dyes used to color that fiber.)

Cartridge Case as an Evidence:

Fracture: A fracture is a break in a bone. Fractures can range from a hairline crack in the bone to the bone being broken into two or more pieces that no longer line up correctly. A fracture may occur at the same time as other injuries, such as sprains, strains, or dislocations. Recovery time for a fracture can vary from weeks to months depending on a person’s age and health; the type, location and severity of the fracture.

Types of Fractures; Fractures have a variety of names. Below is a listing of the common types that may occur:

Greenstick - Incomplete fracture. The broken bone is not completely separated.

Transverse - The break is in a straight line across the bone.

Spiral - The break spirals around the bone; common in a twisting injury.

Oblique - Diagonal break across the bone.

Compression - The bone is crushed, causing the broken bone to be wider or flatter in appearance.

Comminuted - The break is in three or more pieces and fragments are present at the fracture site.

Segmental - The same bone is fractured in two places, so there is a “floating” segment of bone.

What Causes a Fracture? Fractures occur when there is more force applied to the bone than the bone can absorb. Bones are weakest when they are twisted. Breaks in bones can occur from falls, trauma, or as a result of a direct blow or kick to the body

History of Drug, Poison and Chemistry

Best Forensic Lines from Best Novels.

Beginning of Forensic Psychiatry