Blood spatter analysis 2

Antibodies A

Proteins that react with type A blood.

Antibodies B

Proteins that react with type B blood.

Anti-Rh antibodies

Proteins that react with Rh factor.

Sample A

Blood sample tested for type A.

Sample B

Blood sample tested for type B.

Blood spatter

Patterns formed by blood droplets.

Gunshot pattern

Smaller, spread out blood droplets.

Blow to the head pattern

Larger, more cohesive blood droplets.

Blood type determination

Identifying blood type using antibodies.

Type A- blood

Contains A protein, lacks Rh protein.

Type O+ blood

No A or B proteins, has Rh protein.

Blood type testing

Mixing blood with specific antibodies.

Surface effect on spatter

Rough surfaces create spines in droplets.

Smooth surface effect

Smooth surfaces lead to even blood spread.

Distance of blood drop

Height affects spatter pattern formation.

30 cm drop height

Consistent height for blood spatter analysis.

Rh factor

Protein determining positive or negative blood type.

ABO blood group

Classification based on A and B proteins.

Blood proteins

Surface proteins determining blood type.

Spatter analysis

Examining blood patterns for forensic evidence.

Droplet size correlation

Size indicates force and distance of impact.