Introduction to Crime Scene Investigation

Flashcards created for studying key concepts related to crime scene investigation, specifically focusing on trace evidence, hair analysis, fiber evidence, toxicology, and ballistic evidence.

Trace Evidence

Physical evidence that can be linked to a crime scene, such as hair or fibers.

Hair Morphology

The study of the structure, form, and arrangement of hair.

Cuticle

The outer layer of hair, a scale structure that covers the hair shaft.

Cortex

The main body of the hair shaft that contains pigment granules for hair color.

Medulla

The central canal running through the hair shaft, which can vary in shape and density.

Anagen Phase

The initial phase of hair growth where the follicle is actively producing hair.

Telogen Phase

The final phase in the hair growth cycle when hair falls out.

Medullary Index

The ratio of the medulla diameter to the diameter of the hair shaft.

Follicular Tag

A loose strain of hair that contains the root and can provide DNA for identification.

Microspectrophotometer

An instrument used to profile fibers and other trace evidence.

NIBIN

National Integrated Ballistics Information Network, a database for ballistic evidence.

Aggravation Patterns

Patterns formed by blood that can provide insight into the events of a crime.

Opiates

Natural or synthetic substances derived from opium that relieve pain and cause sedation.

THC

Tetrahydrocannabinol, the main psychoactive compound in cannabis.

Polymer

Large molecules made up of repeating units (monomers), which include natural and synthetic fibers.

Precipitin Test

A test used to determine whether a blood stain is of human or animal origin.

DNA Fingerprinting

A method used to identify individuals based on their unique DNA sequences.

Biological Stain

Stains from biological sources (e.g., blood, semen) that can be collected as evidence.

Chemical Composition

The identity and arrangement of atoms in a substance that can help identify its source.

Ballistic Evidence

Evidence related to firearms, bullets, and cartridge cases in criminal investigations.