Pennsylvania woman granted retrial after being convicted of homicide due to unreliable bite-mark evidence

A Fayette County judge determined in a hearing that the bite-mark expert “could not testify to a reasonable scientific degree of certainty about the validity of bite-mark analysis.” The expert later told the judge “he started to doubt the validity of bite-mark analysis in 2008 when the National Academy of Science found the technology is not scientific and that several people among a group of 100 might produce the same bite mark.”  Crystal D. Weimer, 38, had been convicted of third-degree homicide and criminal conspiracy in this case and was serving a sentence of 15 to 30 years in prison.

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