Jimmie Duncan, who spent 27 years on death row in Louisiana after being convicted of murdering his girlfriend's young daughter, has been freed following the emergence of new video evidence that undermined the forensic bite-mark testimony used to convict him. The case highlights long-standing concerns about the reliability of bite-mark analysis as forensic evidence, a technique that has contributed to numerous wrongful convictions being overturned across the United States in recent years.

Duncan was originally convicted over the death of toddler Haley Oliveaux, with prosecutors relying heavily on expert testimony that marks on the child's body were human bite marks left by Duncan. The newly surfaced video evidence is reported to have cast serious doubt on that forensic conclusion, prompting a legal challenge that ultimately led to his conviction being overturned and his release after nearly three decades in prison.