Missouri is scheduled to execute Amber McLaughlin on Tuesday, marking the first time an openly transgender person will be executed in America.

Republican Gov. Mike Parson can spare McLaughlin's life, but he has historically rejected clemency calls. If carried out, McLaughlin would be only the 18th woman executed in the U.S. since 1976, when the U.S. Supreme Court reinstated the death penalty after a brief suspension, according to the Death Penalty Information Center.

McLaughlin's lawyers said Monday that no further legal appeals are pending. A federal judge in 2016 vacated McLaughlin's death sentence due to ineffective counsel, court records show. That ruling was overturned by the 8th U.S. Circuit Court of Appeals.

McLaughlin was sentenced to death for the 2003 murder of her ex-girlfriend, Beverly Guenther.

Parson reaffirmed his commitment to carrying out the execution Tuesday, saying the family and friends of Guenther "deserve peace," according to a statement.

"The State of Missouri will carry out McLaughlin's sentence according to the Court's order," Parson said, "and deliver justice.

McLaughlin, 49, and her attorneys had petitioned the governor to spare her the death penalty. Arguing acute mental health issues and childhood trauma, McLaughlin's attorneys said a foster parent rubbed feces in her face when she was a toddler and her adoptive father used a stun gun on her, according to the petition. The petition concludes McLaughlin's troubled past culminated in multiple suicide attempts, both as a child and an adult.

Further, McLaughlin's attorneys claim that since the jury which convicted her could not agree on sentencing, commuting the judge's death penalty decision would not subvert the will of the jury.

Missouri state law permits a judge to impose the death penalty of a jury's decision is not unanimous.

Two Missouri House Democrats urged Parson to commute McLaughlin's sentence, suggesting life imprisonment with no parole as an alternative.

"Ms. McLaughlin's cruel execution would mark the state's first use of the death penalty on a woman since the U.S. Supreme Court reinstated capital punishment in 1976, and even worse it would not solve any of the systemic problems facing Missourians and people all across America, including anti-LGBTQ+ hate and violence, and cycles of violence that target and harm women," the letter reads.

The only woman executed in Missouri was Bonnie B. Heady, who was put to death in 1953 for kidnapping and killing a 6-year-old boy. The Bureau of Justice estimates there are 3,200 transgender inmates in the nation's prisons and jails.

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