A convicted murderer in Georgia is reportedly asking to be executed by a firing squad due to a condition of his veins his lawyers are arguing makes lethal injection an inadequate option.

Michael Wade Nance was convicted of killing another man in 1993 following a bank robbery, according to The Atlanta Journal-Constitution. He was sentenced to death in 2002, according to the newspaper.

Nance’s attorney filed in the US District Court for the Northern District of Georgia last week a request for a firing squad to be used, arguing that Nance’s veins are “unsuitable” for injection and the method would cause him “excruciating pain,” CNN reports.

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The suit also reportedly said that Nance uses a prescription drug to treat chronic back pain and argues that it has changed his brain chemistry in a way that would compromise the effectiveness of the pentobarbital and cause a greater chance of extended, great pain for Nance.

A firing squad would be a “swift and virtually” painless option, the suit reportedly said.

Gwinnett District Attorney Danny Porter told The Atlanta Journal-Constitution the lawsuit does not change his position that Nance should be executed.

“If he needs a firing squad, then let him have it,” Porter said. “It’s certainly a unique request.”

Death-row inmate J.W. Ledford Jr. asked for a firing squad in 2017 because he used the same drug for chronic back pain; his request was rejected and he was put to death by lethal injection, according to the Journal-Constitution.