Criminology

The use of DNA blood evidence has several advantages in solving a number of criminal cases. It gives more information in cases where the suspect was in close contact with the victim. In some cases, there is a high probability of blood exchange between the two parties. For instance, when the victim was stabbed or beaten. This is different from a case in which the victim was shot from a distance. It is a fact that blood sample collected from around the victim was as a result of bleeding from the gun shot wound. An analysis of blood stains on the suspects body or clothes and that of the victim will help in solving cases where there was close contact (Schiro, 2010).

Secondly, most serious crimes usually involve individuals who commit several other crimes. It would be easier to identify and apprehend these suspects by using DNA blood evidence. This is done by putting the evidence in a data base when a person is arrested the first time. This is the same principle used in fingerprint databases. Banking of DNA provides an easy way of identifying suspects (Human Genome Project Information, 2009).

This is supported by Stewart (2010) who agrees that many criminal cases which lack enough evidence are usually closed many years later. This would deny the victims and their families the justice they deserve. This can be solved by having a data base with DNA blood samples of offenders. Materials will then be collected from the scene and matched with preserved samples of past offenders. Thirdly, it helps in solving cases whereby an individual is convicted wrongfully due to false confessions or misidentifications (Stewart, 2010).

DNA evidence also helps in solving cases involving paternity conflicts. For example, there can be an exchange of an infant during conception either intentionally or unintentionally. The use of blood samples helps in determining the true relationship (Stewart, 2010). It has also been applied in identification of victims, such as fatalities of the September terrorist attacks on World Trade Center (Stewart, 2010).