Blood Spatter Analysis

After the O.J. Simpson trial, scientists began using the physics of blood spatter analysis in forensic examinations.

False

Blood type evidence can be used to exclude a person as a suspect

True

Expired blood patterns are created by blood projected from an object in motion

False

A bloodstain analyst can be law enforcement or laboratory staff

True

Raman spectroscopy estimates when the blood was deposited at the crime scene 

True

Sir William Harvey discovered three blood types: A, B, O

False

The tapered end of a bloodstain indicates the direction of travel

True

Liquid blood evidence is collected in plastic containers at the crime scene

True

Red blood cells are used to produce a DNA profile of blood samples

False

The downside to modern crime scene blood analysis is the expense and the amount of time required 

True

Determining the area of origin ___

can be accomplished once the area of convergence and the impact angles are known

Raman spectrometry accuracy is

70% for up to 2 years

_____ are smeared blood patterns created by objects moving through partially dried blood.

Wipes

____ are created by blood projected from objects in motion

Cast-off patterns

A droplet of blood that falls without any force other than gravity is ___

Referred to as a passive drop

Blood blown out of the nose or mouth ____

Creates an expired bloodstain pattern

Dried blood on clothing is ___

Packaged in a paper bag

High-velocity blood splatter ___

Creates droplets of less than 1mm in size

The area of convergence ___

Shows where a person was standing or sitting when bleeding

Bloodstain patterns in a linear pattern of round droplets of blood are ___

Caused by a person walking while bleeding

The angle of impact ___

Makes a bloodstain round or elliptical

Blood displays cohesion, meaning that ___

Its molecules are attracted to each other

The ELISA test ___

Can confirm that blood is human

____ involves examination of size, shape, distribution, and overall appearance; reconstruction of the crime scene;  and determination of consistency of scientific evidence with the accounts of the crime.

Blood pattern analysis

A Luminol-based product ____

Reacts with hemoglobin