#forensicbiology

A delta, by the technical definition is a place where two lines run side-by-side and then diverge to form a triangle.

In Image you can see where the three sides of the delta form three sides of a triangle.

Deltas help to determine the fingerprint pattern.

A core is a “dead end” formed by a ridge that loops back on itself.

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Methods used for visualizing latent fingerprints.

Latent fingerprints are not visible, but some techniques can make them visible. Dusting surfaces such as drinking glasses, the faucets on bathroom sinks, telephones, and the like with a fine carbon powder can make a fingerprint more visible. Tape is then used to lift and preserve the fingerprint. The tape with the fingerprint is then placed on an evidence card on which the date, time, location, and collector of the print is logged. Proper evidence collection techniques involve photographing the fingerprints before they are lifted. Metal or magnetic powders can also be used. They are less messy than carbon-based powders.

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We are going to Upload a series of Videos according to syllabus of NTA NET/JRF.

These Multiple Choice Questions will help in preparation of examination.

These videos will be prepared in following manner:

Syllabus has been divided into 10 Units and every unit has Pointed topics.

For example Unit - I consists

▪️Forensic Science,

▪️Physical Evidence,

▪️Crime Scene,

▪️Criminal Investigation,

▪️Courts,

▪️Organization of Forensic Science Laboratories of center and state, ▪️Fundamental rights,

▪️Criminal Profiling,

▪️Concept of quality control management in Forensic institutions.

So we will called it as a Topic 1, Topic 2 and so on.

In this Video we have covered Topic 1

Forensic Science: Definition, History & Development, Scope & Ethics in Forensic Science.

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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?

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.