Dallas County Man Freed After Serving 25 Years For Murder Over Faulty Science of Bite Marks

Dallas Morning News
Oct. 13, 2015

Steven Mark Chaney is a free man after spending 25 years behind bars after the faulty science of bite marks sent him to prison for murder.

Dentist Jim Hales told a Dallas County jury that there was a “1 to a million” chance that someone other than Chaney made the bite marks on John Sweek’s body. Now, Hales says the science used to convict Chaney has been discredited.

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