Bloodstain Pattern Analysis

Crime Scene Reconstruction What can be determined: Type of ________ _______ of wounds Type of _____ used Assault & post assault dynamics Relative _________

Crime Scene Reconstruction Bloodstain pattern analysis should be one of the ________ forensic investigations conducted. The probable location of __________, ____, and ______ evidence can be determined from it.

Blood Splash Classification Six types:

Blood Drops Usually found on horizontal surfaces. If blood drops: a _________ distance, they will be _____________. at an ________, they will be ____________. from __________ feet up, they appear ___________. from more than ___ ft., they will produce ____ _____.

Blood Drop Shape of a drop: Angle Surface texture Surface hardness Both fell 42”, left at a 60O angle, right at a 10O angle. The ______ the angle, the more __________. Surface texture Both fell 42”, left hit wall ______, right hit ___________ wallpaper. Surface hardness This drop of blood was tested traveling 4 feet per second onto a _______ surface. It was traveling from right to left at a 56O angle.

Blood Splashes Occur where blood has ________ through the air & hit a surface at an ___________. Usually indicate victim was hit with _________ _______ (cast off bloodstain pattern). Drops appear as _________________ points. The “_____________” indicates direction of movement.

Blood Spurts Due to ___________ action of the heart. Usually from _______ wound to _____ blood vessel. Height can indicate the _________ of the victim (sitting or standing).

Blood Pools ___________ which can form around the victim. _________ of blood can be compared with injuries. Can indicate _______ the victim died.

Blood Smear May be left by ________ or ______________. Often caused by blood on _______ or _______ & subsequent movement. Can identify activity ___________ an assault.

Blood Trails Indicates that the body was _____________. Smeared trail indicates the victim was ____________. _____________ of blood indicate they moved themselves or were carried.

Source of Blood Blood spatter origin (point of impact) can be determined by finding the _______ of ________________. Draw straight lines through the long axis of several drops. The point where the lines converge is the spot _______________ ___________________.