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Create mark evidence

at a crime scene anything could become key evidence DNA fingerprints and tire tracks are common what can also be used are bite marks such as when a killer bites their victim when we bite into something like this Apple our teeth leave a pattern but as evidence the pattern has not always been measured reliably former prosecutor Daniel blinka says that when properly used such evidence is powerful and accurate but points out exceptions there have been a number of cases around the country where techniques weren't properly done where there were miscarriages of justice blinka and forensic dentist thomas johnson are part of a research team that is standardizing how bite mark evidence is catalogued and then matched to a suspects teeth they're creating a database of volunteers teeth specialized software digitally measures the characteristics like arch width and tooth rotation the program could then compare these details with images of actual bite marks as Johnson presented at a meeting of the American Academy of Forensic Sciences they have more than 400 samples so far but it will require many more to scientifically tell how frequently a specific set of characteristics occurs in the population it's a start in the right direction but this has to be continued for many hundreds of thousands or maybe even millions of samples and so that we could get a adequate population database a high-tech database that could change the way forensic dentistry is practiced I'm Sunita Reed