BPA Basics
the shape of a well-formed stain
What is an ellipse?
created when the force acting on the blood is gravity
What are passive bloodstains?
the result of a form of energy being transferred to a blood source
What are projected bloodstains?
an object with blood on it comes into contact with an object on a surface that does not have blood on it
What are transfer/contact bloodstains?
the adjective used to describe Caroline
What is sweet?
can determine the presence of a subject at a scene, the positioning of a victim/suspect/objects, and sequence of events
What is bloodstain pattern analysis?
created by the force of gravity acting alone on small amounts of blood
What are passive drops?
the correlation of velocity and bloodstain size
What is the higher the velocity, the smaller the stain size?
the transfer of blood from a moving surface onto an unstained surface
What are swipe/hair swipe patterns?
the time stated at the beginning of "Gimme! Gimme! Gimme!" by ABBA
What is half past twelve?
creates little to no distortion around the edge of the stain
What are hard, smooth surfaces?
results from blood dripping into other blood
resulting from blood exiting the body under pressure from a breached artery
What is arterial spurting/gushing?
created when an object moves through an existing stain, removing and/or altering its appearance
What are wipe patterns?
the three things Ariana Grande's exes have taught her
What are love, patience, and pain?
What is the area of convergence?
What are flow pattern stains?
blood directed back towards the source of energy or force that caused the spatter
What is back spatter?
a recognizable image of all or a portion of the original surface may be observed in the pattern
What are transfer patterns?
What is sunshine?
equal to the length-width ratio of an ellipse
the function of the sine of the impact angle
a surface that largely distorts the drop
What is wood or concrete?
blood that is blown out of the nose, mouth, or a wound as a result of air pressure and/or flow which is the propelling force
What is expiratory blood?
the image observed in the pattern of the sixth picture on the slide (bottom right)
What is a handprint?
John, Paul, George, and Ringo's favorite bird
What is a blackbird?