Importance of Accurate Bloodstain Spatter Analysis in Crime Scene Investigations - Research Paper Example

Due to the certification of more technicians, a lot of information on the shape of bloodstain is being used in the conclusion of crime events. Blood stain pattern analysis is the assessment of the nature, position, and distribution pattern of bloodstains that should enable an investigator to deduce the physical actions that took place at the scene. The outcomes obtained from the analysis give extra information to medical practitioners when determining the time the victim died. Certified bloodstain pattern analysts are normally used in offering explanations on blood spatter patterns and supplementary verifications at the crime scenes.

This assists in the disclosure of vital exploratory information; like the positions of the casualty, the attacker, the items at the scene; the weapon that created the spatter and the number of blows, blast, or stabs the victim received. It can also be used to agree or contradict the report the wounded, suspects or observers give, hence ensuring that an innocent person is not condemned. Basically, inert bloodstains are as a result of the gravitational pull. They are normally evident on the various surfaces like the floor, wall, or the clothing.

In carrying out crime Scene investigation therefore, documentation of all stains must be done. During blood stain pattern analysis, investigators always apply the physics, mathematics, and trigonometry laws, which assist the investigators to acquire information which enables them to determine the actions that took place; the individuals who were there, and the authenticity of the self defense declaration of the alleged doer. In the crime scene, there may be numerous areas with blood spatters.

Identification of all locations with blood spatters and carrying out the necessary analysis is therefore vital. Moreover, after the scene has been documented, the resolution of the course and succession of actions enables the CIS in laying strategies for the collection of blood samples from the most rational sites. When careful analysis of the scene is done, accurate representative blood samples will be presented to the crime laboratory for analysis. Introduction Blood pattern analysis assists investigators in the determination of the source of the blood, the distance through which the blood traveled before landing, the form and the bearing of the force that caused the blood stain, the object used to produce the bloodstain, and the position of the casualty and the attacker during and after the bloodshed.

Normally small blood spatters are as a result of a lot of force having been used. In order to obtain accurate results, blood pattern analysts must be careful in doing the assessments. Blood spatter as evidence Due to the gravitational pull, the shape of a free falling drop of blood is spherical. The force of gravity results in surface tension which makes the blood molecules to adhere on one another. Due to surface tension, the distance through which the drop of blood falls does not affect the spherical shape (Chisum & Turvey 374).

The drop of blood will only break after hitting another surface or when force is exerted on it. When a blood drop hits an impermeable, smooth, and firm surface for instance floor tile, the probability of it forming a spatter in minimal. Freely dipping blood forms huge circular stains. Rough surfaces interfere with the surface tension of the blood drops, thus resulting in spatters and uneven stains having serrated edges. Presentation of precise