Alabama inmate Nathaniel Woods was executed Thursday evening after the US Supreme Court denied a stay of execution.

Woods was sentenced to death under the theory of accomplice liability for the deaths of three Birmingham police officers: Carlos Owen, Harley Chisholm III, and Charles Bennet. However, there was controversy in regards to the constitutionality of Woods’ conviction and sentencing. Specifically, it was claimed that Woods had been provided with inadequate legal counsel. Additionally, Woods’ current legal team has claimed that the evidence and witness testimony were not reviewed by the appeals courts as a result of legal missteps.

Nonetheless, the Supreme Court ultimately denied the staff after Justice Clarence Thomas had issued a brief order temporarily blocking the execution earlier in the day.