Point of Impact / Point of Origin

Point of impact is the point of which some object strikes a bloody source. Point of origin is the three diamentional area where a bloody object is struck.

Shadowing and Ghosting

Shadowing and Ghosting occur when blood is sprayed around a room and there is an intervening target.

Swipe/Wipe

Swipe and Wipe are terms used when blood is put onto a surface, wipe’s occur when something that is not blood stained move through a bloody surface. Swipe’s occur when a bloody object moves across a non-bloody object.

Transfer Patterns

Transfer patterns occur when something bloody is placed on a surface and some form or recognizable shape is produced.

Blood into Blood,

When blood drops fall into a blood drop that already hit a surface, the blood makes a satellite kind of shape. Other drops are usually made from that drop as well.

Expiratory blood,

Expiratory blood is blood is blood that come out of an air way or passage way as result of a cough or sneeze.

Arterial Spurts happens when a victim’s artery is breached or punctured. Because the human heart is a very strong pump the blood is going to be pushed out at a significant
amount of speed, that blood deposition it creates is a rather distinctive blood spatter when
it hits a vertical surface.

Cast off stains happen when an object with blood on it, is moving at a significant amount of speed and that blood hits a surface. Usually the blood is in a vertical line.

For the next three days I’ll be discussing 6 different Blood Spatter topics including,

Blood into blood

Expiratory blood

Point of origin

Shadowing/Ghosting

Swipe/Wipe

Transfer Pattern

There are alot of tools and equipment used by Crime Scene Investagators so ill list the most common tools and equipment used by Crime Scene Investagators,

• Crime Scene tape to cordon off the area
• A flashlight
• Latex gloves and paper shoe covers
• A magnifying glass and tweezers for collecting trace evidence
• A pen, logbook, and sketchpad
• Measuring tapes and rulers
• A camera with black and white and color film and several different lenses
• An assortment of paper, plastic, and glass containers store collected materials
• Sealable evidence bags
• Portable alternative light sources - laser, ultraviolet, and infrared
• Basic fingerprint kit with powders and lifting tape
• Casting kit for three-dimensional shoe and tire impressions
• Gunshot residue detection kit
• Chemicals to locate occult bloodstains
• Serology kit for sampling blood and other biological fluids
• Rape Kit

- Brandon Anderson