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University of Toronto Mississauga
Forensic Science
Hisham Ragab

Digital 3D Forensic Facial Reconstruction Biomedical communications - Visual communication of science - Interpretive visualization: images crafted to meet the needs of a particular audience Facial Recon - Unique form of scientific visualization - Police investigation - Create an image: skull structures Background: - Digital modeling - Anatomy, anthropology, primate face development Why? - Possible vs. positive identification - Positive ID established through: DNA, radiological, odontological, fingerprint comparisons To: 1. Create likeness of the individual 2. Present the likeness to the public 3. Generate new investigative leads 4. Establish a positive ID - Predictable relationship between structure of the skull and structure of face. - The soft tissue of the face is varied in composition and thickness in different areas - 19 century tissue depth in different parts if the face, used in historical figures and anthropological practice How: - Clay - Digital method: not automated - Smoothed and painted Presentation to the public: - General public - Casual: may have known the individual, to trigger recognition and convince them to call the police - Primed: Actively seeking a missing person, Case study: Forensic Anthropologists - Search for, document, recover, analyze human remains - Ontario Forensic Pathology Service and Offices 2010 - Required if: burned, buried, outdoor, scattered, badly decomposed or skeletonized remains - To determine if it is the police or coroner’s case - Human bone: forensic significance (police or no police) Criteria for forensically significant bone - Usually human - Modern individual: Time since death in 50-60 years Not of interest: - Archaeological or historic - Medical teaching remains - “Secret societies” - Associated with a cemetery Determining Forensic Significance: - Context: where is it found - Condition: recent/fresh or old - Associated objects Initial assumptions (phone call/email): - Bone found at a cemetery - Could be animal - Email photo looked human - Typical cases in cemetery: eroded from grave, incompletely exhumed, vandalism The scene: - Pouring rain - Woman walking dog found bone on Monday, reported on Thursday - 9 fragments: picked up and took home, showed where she was found, pointed
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