Bloodstain Pattern Analysis || Questions with complete solutions

crime scene reconstruction correct answers - method used to support a likely sequence of events by the observation and evaluation of physical evidence and statements made by those involved with the incident - A CSI can bring special skills to the reconstruction of events that occurred during the commission of the crime History: General Bloodstain Features correct answers - bloodstain patterns deposited on floors, walls, bedding and other objects can provide valuable insights into events that occurred during a violent crime. - CSI must remember that the location, distribution, and appearance of bloodstains and spatters may be useful for reconstructing the events General Bloodstain Features correct answers bloodstain pattern interpretation may uncover: - direction from which blood originated - angle at which blood droplet struck a surface - location of position of victim at time bloody wound was inflicted - movement of bleeding individual at crime scene - approximate number of blows that struck a bleeding victim - approximate location of an individual delivering blows that produced bloodstain pattern Effects of Surface Texture correct answers the harder and less porous the surface, the less spatter results - surface texture and stain's shape, size, and location must be considered when determining bloodstains direction, dropping distance and angle of impact - Rough surfaces usually result in irregularly shaped stains with serrated edges Directionality and Angle of Impact correct answers the direction of travel of blood striking an object may be discerned because: - pointed end of a bloodstain always faces its direction of travel -the disrupted edge of an elongated stain indicates direction of travel Impact angle of blood on flat surface can be determined by measuring degree of circular distortion: - right angles: circular - as the angle decreases: stain becomes elongated - larger angles: build up of blood - smaller angles: longer and longer tails Impact Bloodstain Spatter Patterns correct answers Impact spatter: bloodstain pattern produced when an object makes forceful contact with a source of blood - most common bloodstain patterns - forward spatter: blood that travels away from the source in the same direction as the force that caused the spatter - back spatter: blood directed back toward the source of the force that caused the spatter; aka blow-back spatter