Hair Analysis. Identification of species through microscopy. Collection of Hair Specimen. Examination of the Medulla. Patterns in Animal Species. Examination of Scale Pattern. Human Hairs. Racial Determination. African. Asian. European. Hair Roots.
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Identification of species through microscopy.
Examination of Scale Pattern
Pulled Forcibly Removed Shed
Burned Cut Razored Split
Differentiation between human and animal hair
The medulla is the core of a hair – it is, however, not always present.
There are several types and patterns.
Intermittent or interrupted
(mostly medulla with some gaps)—
human pubic hair, sometimes head hair
Fragmented (mostly gaps
with some medulla)—mostly human hair
Absent—human head hair only
Rabbit -- Multiserial
Rabbit -- Uniserial
Medullary Index: More than 1/2
Medulla Pattern: Vacuolated
Now Take a look at some slides of different kinds of hair, straight from the FBI. Can you guess what hair is human and what hair isn't?
Mosaic Pectinate Imbricate Petal Diamond Petal Chevron
NO! The body will dehydrate soon after death, shrinking as a result. The fingernails and hair will appear to grow. Just an optical illusion!!