forensic reconstruction

This graphite illustration involved drawing a skull specimen and then reconstructing what the persons face might have looked like using knowledge of muscles, tissue depth, age, race, sex…etc.


Bloodstain pattern analysis (BPA) is one of several forensic science specialities that can help determine what exactly came to pass on a scene of a violent crime. Technologies for it are evolving constantly, which leads to a higher degree of accuracy than in the past.

Eduard Piotrowski published a paper entitled “on the formation, form, direction, and spreading of blood stains resulting in blunt trauma at the head” in 1895. The various publications that followed did not lead to a systematic analysis the way we know today. Herbert Leon MacDonell advanced the research that eventually culminated in the 1971 publishing of “Flight Characterisics and Stain Patterns of Human Blood”. He went on to present the first formal training course for bloodstain pattern analysis.

Crime scene investigator Sherry Gutierrez put forth some general principles for the analysis of gunshot wounds in particular that roughly indicate what can be deduced from those. These are as follows:

  1. The amount of forward spatter (away from the shooter) is greater than the back spatter (towards the shooter).
  2. The velocity of the forward spatter is greater than the velocity of the back spatter.
  3. Both forward and back spatter have a lower velocity than the bullet. (The relationship of the velocities from high to low can therefore be visualised as bullet –> forward spatter –> back spatter.)
  4. Both forward and back spatter form a “cone” of mist. 
  5. The density of the fluid droplets from an impact to a fluid-containing structure decreases as the distance from the bullet impact increases.
  6. High velocity wounds to bone may cause bone to go both forward and backward alongside the spatter.
  7. The bullet exits in the direction opposite of the shooter.

Forward spatter usually travels farther than the back spatter in the same incident. It also holds a larger volume of blood that expresses as individual stains than the back spatter does. Targets may move with the direction of the projectile upon the moment of impact, so (for example) someone who was shot in the back may move forward. Similarly, if the target is located in a moving vehicle the wind and other circumstances may affect the forward and back spatter to a degree.

Bloodstain pattern analysis can also be made visual by documenting bloodstains at the scene of the crime and measuring the angles of impact that can lead every trajctory back to an ‘origin point’. Nowadays, computer programs are used to visualise these calculations further and create a 3D-model of the circumstances of the crime. An older method is called “stringing” and consists of attaching a coloured string to the point of impact and running it to the termination point (like the wall or floor). The convergences and crossing points of these strings can then be used for crime scene reconstructions.

anonymous asked:

I think the major reason Delta Dawn and Walker County Jane Doe are referred to in terms of looks is because they're unidentified. Like there obviously are issues of the sexualization of female murder victims, but in cases where there's no identity, physical features and forensic reconstructions are basically all law enforcement have to go on

If that’s the case, then law enforcement should just disclose the person’s features. whatever happened to saying “Jane Doe is a blonde female with a tattoo on her left wrist” instead of saying stuff like “The mysterious lady was beautiful, even in death”? WTF

You know, cartoons and books have spoiled me for ease of fan art making. Making fan art for TV shows is hard.

With books, you’ve got a reasonable amount of free rein to design a character how you like. It’s still possible to make a mistake, but because of how little most book characters are described, there are fewer things to make a mistake with.

Cartoons are cell shaded, which means you can just use the eyedropper tool on a character’s skin and bam! you have their skin tone for those lighting conditions.

TV shows though? You have to forensically reconstruct people’s undertones from weirdly orange red carpet shots and very blue lit shots from the show itself.

youtube

Neanderthal II - time lapse video of a forensic facial reconstruction by Sculpt Mode on Blender

  • reconstruction by Cícero Moraes

3D scanning of skull: Python Photogrammetry Tools
3D Sculpting: Blender
Screen capture: FFMPG
Video edigint: Kdenlive

Mesmerising timelapse video of a virtual reconstruction of a Neandertal cranium. Virtual anthropology the world!

youtube

Reconstructing Homo antecessor

  • by Mauricio Anton

“A video that tries to summarize in just 2 minutes my work of several years on the reconstruction of the face of Homo antecessor.”

(Source: Mauricio Anton)

vimeo

This is a facial reconstruction of a Homo georgicus male, based on the Dmanisi skull nº D2700. Done in Zbrush, Cinema4D and VrayForc4D" by Phillip Froesch.

“When I rise from the dead, the world shall tremble.”

“Who ever opens my tomb, shall unleash an invader more terrible than I.”-alleged script from Timur’s tomb and casket

February 18, 1405- After a lifetime of conquest and war, on the march to defeat the one power in the world who could even dare to challenge him, Timur, also known as Tamerlane, dies en route to invade Ming China. Starting out as the leader of a small raiding band, Timur would become the master of an empire spanning from his his capital at Samarkand, down into India, across Afghanistan and all of Iran, to Baghdad, Anatolia, and the Caucasus, though he never took a title for himself higher than Emir. Despite his brutal tactics and nature, the storied pyramids of skulls, Samarkand became a center of culture and art in the Islamic world. He spread Persian learning to Transoxiana and Timurid architecture, itself inspired by a mosque in Damascus, would evolve into the onion domes of Russian churches and the beautiful spires of the Taj Mahal. 

‘Then shall my native city, Samarcanda…
Be famous through the furthest continents,
For there my palace-royal shall be placed,
Whose shining turrets shall dismay the heavens,
And cast the fame of Iion’s tower to hell.’

  -Christopher Marlowe, Tamburlaine the Great                                         

Picture- A forensic facial reconstruction of Timur by M. Gerasimov (1941).

Kids' forensic facial reconstruction kit

The Discovery Channel has released a CSI-branded “facial reconstruction kit” toy so that kids can play forensic scientist, reconstructing notional corpse faces. Man, I wish I’d had one of these as a kid. Link