blood spatter Flashcards
while blood may be encountered at most violent crimes it…
won’t contain blood spatter evidence that rise to the level of reconstruction efforts
why don’t police department have blood spatter analysis
-lack of resources
-time
-energy for training
-peer review
BPA is a ——- and not consider a ——
discipline and science
what scientific principles does bpa rely on
biology, physics and math
the daubers standard
Under the Daubert standard, the court provided guidelines for determining whether an expert’s methodology is valid.
what are the five factors of consideration
- Whether the theory or technique in question can be and has been tested
- Whether it has been subjected to peer review and publication
- Its known or potential error rate
- The existence and maintenance of standards controlling its operation
- Whether it has attracted widespread acceptance within a relevant scientific community
what does dna have the ability to do
QUANTIFY THE PROBABILITY OF A MATCH THUS MINIMIZING THE DIFFICULT DECISIONS OF CULPABILITY.
what are blood stains are classified by
physical features of size, shape, location, concentration and distribution into passive stains
what are the three pattern categories
passive, spatter, altered
what are passive stains
most frequently encountered types
they tell the story of movement and position
it drops because of gravity and the drip stains from the victim
flow pattern
often assist cs invesgatiors in determining if a body has ben moved or altered
impact spatter pattern
force applied to a source of blood, creating a pattern of spatter that exhibits directionality
spatter stains
includes patterns that were produced with outside force like impact spatter patterns from a gun shot wound.
this pattern will have directionality and can show where the impact took place in space
transfer pattern
the way blood is transferred
altered patterns
includes things like insect or something else changing the original patterns
