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Forensic medical examination of blood stains

In the snow the traces of blood seized with possibly fewer snow and place in a bowl or other vessel on the bottom of which is a pre put composed of several layers of gauze or cloth. When the snow melts in warm premise blood pervades gauze, which then dried at room temperature. To control and send the sample used Marley without blood. Blood stains on the bottom, withdrawn together with the ground at the depth of impregnation blood. As the sample is collected soil saturated with blood. Subjects with blood stains found in the wet state, before heading on the study should be dried at room temperature, in a dark place. Material evidence with blood stains should be protected from the action of high temperature, friction, moisture, sunlight.
Packaging and direction to the examination of objects, having the blood, produces the investigator. Items are Packed in a way that preserves during transportation on the tracks and at the same time, to prevent loss or substitution of material evidences, their pollution. Spots located on the soft objects, top, covered with a white cloth, clean paper or polyethylene film, which sew or paste. Solid objects areas with traces of blood, carefully wrapped in a clean paper or polyethylene film, which fasten a thread. Each seized item or its part after covering the tracks are wrapped separately into a clean paper, tied up and seal. Crates or boxes sent for examination subjects tie top rope, which ends fasten a wax seal of the investigative body or the court so that the rope cannot be removed without breaking the history of printing and packaging. On the crate or box is an inscription indicating to which the case relates material evidence, which is inside the package.
To identify the blood on the material evidences specific individuals investigator into force senior 186 of the code of criminal procedure of the RSFSR organizes blood samples from the victims, defendants and sends them simultaneously with the seized objects with traces of blood on the study. The taking of blood samples is made on the basis of the investigator and is registered in the Protocol. Blood samples taken from a finger or from a vein (4-5 ml) in special tubes: the tube attach a label with the indication of the surname, name and patronymic of the person from whom it was taken, the date of blood collection and signature of the person who took the blood. The tube or the eyedropper wrapped in cotton wool is placed in a rigid container and seal.
In cases of long transportation taken blood preliminarily dried on a plate or a Petri dish, pouring it on a clean gauze folded in four layers. Drying is performed at room temperature without access insects. After drying blood gauze placed in an envelope, which shall be indicated the date of blood collection and surname of the person from whom it was taken. In another envelope, put a clean gauze from the same piece for control studies. Blood samples in liquid form, shall be Packed separately from the material evidence. Samples of blood from the corpse takes a forensic medical expert or doctor-expert during the autopsy of the corpse of the cavities of the heart or great vessels. No Pets blood sample is collected in the body cavities.