Animal hair and animal fibers, like human hair, are one of the important fine evidence found at the crime scene, and if there is contact between a suspect and a victim, they can be easily transferred to each other's body or clothing by material exchange, which can be useful in identifying or proving contact.
This study was intended to analyze the characteristics of medulla according to differences in breed, individual, and body parts (Head, Ear, Back, Abdomen, Tail) at the same time for build DB data for the identification of species of animals, and analyze 108 samples from 28 breeds of dogs, 29 samples from 8 breeds of cats, 24 samples from 24 other animals, and 17 samples from animal fibers (Mink, Fox, Rabbit, Raccon).
Depending on the morphological characteristics of medulla, three types were ① Continuous, ② Absent, and ③ Interrupt. The Continuous sub classifications included six types: ① Unisual Ladder, ② Multisual Ladder, ③ Amorphous, ④ Globular, ⑤ Latice and ⑥ Cellular, The Absent sub classifications included two types: ① Empty and ② Full totally classified 9 types and types of medulla that do not belong to 9 types are classified as ETC types.
The analysis results are as follows:
① Different types of medulla were shown according to animal species, breeds, objects, and animal body parts (Head, Ear, Back, Abdomen, Tail), and various types of medulla were found in one species, and the same types of medulla could appear in the other species.
② It was confirmed that the pattern of medulla in animal hair appeared the same in animal fibers, and that artificial pigments appeared in the area of the cortex for products.
③ Various types of medulla can be observed in fibers or animal hair found at crime scenes, so investigators could see that the control evidence should be collected as diverse as possible, and that animal species should be carefully considered in estimating species through a qualitative analysis