Bloodstain Tutorial

The success or failure of any criminal investigation often depends on the recognition of physical evidence left at a crime scene and the proper analysis of that evidence. Crime scenes that involve bloodshed often contain a wealth of information in the form of bloodstains. The pattern, size, shape, and the location of such stains may be very useful in the reconstruction of the events that occurred. William G. Bloodstain Pattern Analysis: The examination of the shapes, locations and distribution patterns of bloodstains in order to provide an interpretation of the physical events by which they were created that is based on the premise that all bloodstains and bloodstain patterns are characteristic of the forces that have created them. The interpretation of bloodstain patterns found at the scene or on exhibits such as the clothing of the principles of the occurrence can be used to: Properties of Blood: A blood loss of 1.5 liters internally/externally is required to cause incapacitation.

ThrillWriting: Blood Pattern Information for Thriller Writers But also, my youngest daughter is a type 1 diabetic. I prick her finger, and use her blood, an average of 21 times a day to figure things out. A drop of blood is analyzed by her meter giving me a snap shot of what’s going on in her body. Is it the whole picture? No. Is it the big picture? This is my understanding of how a forensic scientist goes to work. Mechanisms o:f Deposition:Passive - clot, drip, pool, flow saturation, serum separation.Transfer - swipe and wipeProjected - arterial spurts, cast off, expiration, splashesMiscellaneous - fly spots, voids Transfer Patterns - occur when an object that has blood on it rests on a surface leaving an outline. Blood will change its pattern based on the angle at which it contacted the surface. THE USE OF LCV - is a chemical substance that is used to check for blood in - * Missing person cases where a crime is suspected. * Areas where a suspected violent crime occurred but it has been cleaned/bleached * Visible substances suspected to be blood