MICROANATOMY

Detailed explanation-1: -Class evidence consists of substances such as blood and hair, which can be used to place an individual in a general class but cannot be used to identify an individual. For example, blood typing can be used to establish whether someone has A, B, AB, or O blood, but cannot point to a person.

Detailed explanation-2: -ABO blood typing has been used for personal identification and paternity testing in forensic medicine and criminal investigations for many years, since the ABO blood types obtained from evidentiary samples are usually one of the initial pieces of information available that could lead to identification of the suspect.

Detailed explanation-3: -The most common applications of blood evidence are: Finding blood with the victim’s genetic markers (ABO blood type, DNA profile, etc.) on the suspect, on something in the suspect’s possession, or something associated with the suspect (such as the suspect’s fingerprints).

Detailed explanation-4: -Because many different people share the same type, this blood evidence is considered to be class evidence. By typing the blood found at a crime scene, it is possible to link a suspect to a crime scene or to exclude a suspect.

Detailed explanation-5: -Forensic scientists often use techniques to identify blood types (blood typing) because an individual’s blood type isn’t affected by disease, drugs, climate, occupation, living conditions, or any other physical circumstances.