Bite Marks Dr. M. Diamond. Dental Identification Victims –Especially from fires or explosions...
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Transcript of Bite Marks Dr. M. Diamond. Dental Identification Victims –Especially from fires or explosions...
Bite Marks
Dr. M. Diamond
Dental Identification
• Victims– Especially from fires or
explosions– By dental records
• Suspects– Match dental
impressions to bite mark impressions
– On skin or bones
• 30 – 76 comparison factors to consider
Teeth
• Tools• Tooth mark is like a
tool mark• Chip, get worn down,
shift or be reshaped• Also
– Restorations, fillings, breakage, tooth loss, injury, etc.
– individualizes
Charting Teeth
• Each tooth assigned a number, 1 - 32– #1 = upper right third
molar– #32 = lower right third
molar
• Each tooth has 5 visible surfaces
Physical Characteristics
• Distance from cuspid to cuspid
• Shape of mouth arch• Tooth alignment• Tooth width and
thickness• Spacing between
teeth• Overbite/underbite
• Missing teeth• Curves of biting
edges• Unique dentistry• Wear patterns
– Chips– grinding
First Bite Mark Case
• Scotland, 1967• Linda Peacock, 15• Found beaten and
strangled• Clothes in disarray• Bruise on right breast• Bite mark• Showed uneven teeth
Evidence
• Witnesses had seen male and female together near crime scene
• Inmates of detention center for young men questioned
• Impressions taken of 30• Narrowed to 5• Additional impressions• Arrived at suspect
(Gordon Hay, 17)
• Pits from hypocalcination• Jagged teeth• Other evidence
– Hay had come in late the night of the murder
– Had mud on clothes– Reportedly had met victim
recently
• Convicted of murder• Bite mark evidence part
of profiling– Indicates psychological
factors