Huntsville, Texas (CNN) – A last-ditch push to keep a convicted cop killer alive failed Wednesday night when the U.S. Supreme Court denied a motion to stay his execution.

Edgar Tamayo Arias, a Mexican national, was executed at 9:32 p.m. CT, the Texas Department of Criminal Justice said.

His execution marks the first of the year in Texas and the 509th in the state since the death penalty was reinstated in 1976.

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