Gary Otte was only 20 years old when he shot two residents in the head at a suburban Cleveland apartment complex in 1992, and his lawyers said Tuesday it would be cruel and unusual punishment to execute someone who was that young at the time.
The now 45-year-old inmate's last-minute appeal to the Ohio Supreme Court to halt his Wednesday execution at a Lucasville, Ohio, prison cites an August Kentucky circuit court that ruled as unconstitutional executing inmates younger than 21 at the time of the crime.
Otte's appeal for a stay argues his execution violates "the Eighth Amendment's evolving standards of decency based on his status as an adolescent at the time of his offenses."
The U.S. Supreme Court previously outlawed executions for those under 18 at the time of their crime.
Republican Governor John Kasich rejected a clemency request from Otte on Sept. 1.
If Otte's appeals fail, the execution would mark Ohio's second in 2017 following a three-year hiatus because of difficulties obtaining the lethal injection drugs used and legal challenges to that mix.
In July, Ohio put to death 43-year-old Ronald Phillips, convicted of raping and killing a 3-year-old child.
Ohio in 2015 halted executions due to the difficulty in obtaining lethal injection drugs. The following year, the state said it would restart executions using a new three-drug protocol.
Otte was among those challenging the use of midazolam as a sedative in that mix. Several U.S. states have used midazolam in executions, including Oklahoma and Arizona, where witnesses said inmates during past executions appeared to twist in pain on death row gurneys.
A U.S. appeals court in June lifted a preliminary injunction, clearing the way to resume executions. After Otte, 25 people are slated for execution in Ohio through 2022.
Otte was found guilty of murder after he shot 61-year-old Robert Wasikowski in the head from less than two feet away and stole $413, according to court documents.
The next day, Otto returned to the same apartment complex and shot 45-year-old Sharon Kostura in the head before stealing $45, her car keys and a checkbook, documents show.
Otte recently wrote a letter, published Friday by website Splinter, in which he blamed an addiction to crack cocaine.
"I just want it over with," Rhonda Rogers, Kostura's niece, told the Cleveland Plain Dealer newspaper on Tuesday. "I'm not taking pleasure in somebody's impending death. He murdered two people and now he's going to pay for it."
(Reporting by Chris Kenning; Editing by Jonathan Oatis)