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A blog to teach the fundamentals of Crime Scene Investigation, and to encourage input, feedback and involvement from site visitors. The interpretation of blood spatter was first mentioned in a paper written in the 1890s by a researcher at the Institute for Forensic Medicine in Poland, Dr. A significant number of high profile criminal cases have been prosecuted when blood spatter evidence was included among the physical evidence. Other cases involving prominent personalities where blood spatter entered into the evidence were the O.J. Using this method, the analyst can determine if the victim was standing or kneeling and how far away he was from the surface that contained the blood stains. To become a blood spatter analyst, specific training is required to reach the point that the analyst is accepted as an expert in this field. Professional AssociationsThe International Association for Identification has certified me as a Senior Crime Scene Analyst.
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Popular crime-scene shows like CSI and Dexter can give viewers the impression that they're well-educated armchair scientists, but anyone in a forensics lab will tell you that we don't know jack. Which is why it's so annoying to watch CSI, Criminal Minds, Dexter, and other forensics series. Bloodstain pattern ysis is one method crime-scene investigators use to get the scene to tell a story. Crime Scene Training A blog to teach the fundamentals of Crime Scene Investigation, and to encourage input, feedback and involvement from site visitors.


Season four of Dexterstarts up in just a few weeks, and Mark Ecko Entertainment is ringing things in with Dexter The Game for iPhone, available for $6 on Applea€™s App Store. In Dexter The Game, you probe a€?fully realized 3D environmentsa€? as Dextera€”voiced by show star Michael C. Trajectory of the blood droplets: Using visual examination at first, the analyst can tell whether a droplet struck the surface at a 90-degree angle or at some more acute angle. Once the angle of incidence is determined, the analyst attaches strings to the surface that simulate the flight path of these droplets.
It is not invested in one side of the case or another; rather, its aim is to ensure impartial and unbiased opinion based upon a foundation of proven evidence. The folks at Forensic Nursing break down the science of blood pattern analysis (BPA) in  this handy infographic, detailing the types of spatter, and how the analysis is made. There's a lot of pseudo-science (handwriting analysis), pop-psychology, and downright impossible things (getting very clear, zoomed images from VGA-quality security cameras). Bloodstain pattern ysis has been used informally for centuries, but the first modern study of blood stains was in 1895. OK, probably more than one, though that probably depends on your definition of both a€?seriala€? and a€?killer.a€? But how many serial-killer-playing-games are based on TV shows that can say they made you root for a gleefully violent guy who wraps human victims in swathes of industrial plastic, taunts them with pictures of their victims, then plunges a butcher knife through their sternum and into their hearts? Hall himselfa€”dissecting crime scenes, unearthing evidence, and employing stealth mechanics to hunt your victims. We give you the scoop on what's new, what's best and how to make the most out of the products you love.
This can be determined by simple, portable field tests using chemicals such as Phenolphthalein or Leucomalachite. The strings will all cross each other at some distance from the surface and this indicates the point of origin of the various stains.


To learn more about how CSIs identify possible blood stains at the crime scene, download a free technical bulletin at the website listed below. What's also alarming is the strong gene-deterministic undercurrent whenever they tackle criminal behavior.
Hall), full-time blood spatter analyst for the Miami Metro Police Department as well as surreptitious serial killer? These tests are presumptive in nature and are not proof positive that the substance is blood. If it travels into the surface from angle, the stain will be elongated—resembling an exclamation point with the narrow end of the stain pointing in the direction of travel—away from the source.
As in the show, Dexter follows a code (ita€™s mutating in the show, but the game follows season one): Only kill the guilty, maintain your a€?mask,a€? and above all, dona€™t get caught.
Paul Kirk offered an affidavit on blood spatter analysis, which was the earliest instance for the legal system to be made aware of the value of blood spatter analysis. Kirk’s analysis was able to show the location of the victim and the assailant, and it showed that the victim was struck by the assailant’s left hand. But these tests do not differentiate between human and animal blood, which require further laboratory analysis.



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