A lawsuit filed says a death row inmate in Georgia has sued the state’s prison system, saying he should be executed by firing squad instead of lethal injection because his veins are narrow and the latter method would cause him “excruciating pain.”

Michael Wade Nance was sentenced to death in 2002 for fatally shooting a man who refused to hand over his car during a bank robbery in Lilburn, Georgia.

The lawsuit said Nance’s veins are “severely compromised” and difficult to locate, adding there’s a possibility they would lose their integrity and leak the pentobarbital (the drug used in lethal injections) into the surrounding tissue.

“Execution by firing squad is both swift and virtually painless,” the lawsuit said. “Evidence and recent experience strongly suggest that the firing squad is significantly more reliable than lethal injection.”

Nance has also been taking drugs for back pain, which the lawsuit said has altered his brain chemistry and could disrupt the effectiveness of pentobarbital, leading to even more pain, according to the outlet. It would create a “prolonged execution that will produce excruciating pain,” the lawsuit said.

Gwinnett District Attorney Danny Porter was notified on the request, calling it “unique.”

“If he needs a firing squad, then let him have it,” Porter said.

The firing squad is an alternate method of execution that has been employed three times since 1976. Only Mississippi, Oklahoma and Utah offer firing squad as a method of execution.