April 30 (UPI) -- The state of Texas on Thursday evening executed a 37-year-old man convicted of a double murder in 2008 that he said he didn't commit and that another man has taken responsibility for.

James Garfield Broadnax was executed by lethal injection at the Texas State Penitentiary in Huntsville, located about 70 miles north of Houston. He was pronounced dead at 6:47 p.m. CDT, the Texas Department of Criminal Justice told UPI in a statement.

He was killed for the murders of music producers Stephen Swan and Matthew Butler during a robbery outside a Garland, Texas, music studio, in mid-June 2008. After initially confessing to the crime, Broadnax claimed innocence while his co-defendant and cousin, Demarius Cummings, later admitted to being the gunman and having asked Broadnax to take the fall.

Broadnax used his last statement to reiterate his innocence.

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