Corrections officials in Georgia have temporarily halted all planned executions to give the state time to analyze a drug that prompted the last-minute postponement of an execution.

Kelly Renee Gissendaner was set to be executed Monday at 7pm. Officials postponed it “out of an abundance of caution” because the pentobarbital meant for the execution appeared cloudy.

The department of corrections said in a news release Tuesday that it would postpone the execution of Gissendaner and Brian Keith Terrell, who was set to die next week.

But the state’s lawyers called Gissendaner’s attorneys several times, changing their minds about whether to go forward, Gissendaner’s lawyers wrote in an emergency motion for a stay of execution filed late Monday with the US supreme court. Without intervention by the high court, Gissendaner’s lawyers said, the state could decide to go ahead and execute her.

No new date was given for Gissendaner’s execution.

Pentobarbital is the only drug used in Georgia executions. For other recent executions, the state has gotten the drug from a compounding pharmacy. Officials did not immediately respond to an email late Monday asking if that was the source in this case. Georgia law prohibits the release of any identifying information about the source of execution drugs or any entity involved in an execution.

Gissendaner was originally set to die 25 February, but corrections officials delayed the execution because of an impending snowstorm.

Gissendaner would have been the first woman executed in Georgia in 70 years and only the 16th woman put to death nationwide since the US supreme court allowed the death penalty to resume in 1976. About 1,400 men have been executed since then, according to the Death Penalty Information Center.

Gissendaner was convicted of murder in the death of her husband, Douglas Gissendaner. They had a troubled relationship and divorced and remarried. At the time of her husband’s death, Gissendaner was a 28-year-old mother of three children, 12, seven and five years old. And Gregory Owen was her on-again, off-again lover.

Rather than divorcing her husband again, Gissendaner repeatedly pushed Owen to kill him, prosecutors said. Acting on her instructions, Owen ambushed her husband while she went out with friends, and forced him to drive to a remote area. Then he marched him into the woods and stabbed him multiple times, prosecutors said.

Owen and Gissendaner then met up and set fire to the dead man’s car in an attempted cover-up. Both initially denied involvement, but Owen eventually confessed and testified against his former girlfriend.