The U.S. Supreme Court late Thursday temporarily paused Alabama's plans to execute a man convicted of killing a convenience store clerk, after defense lawyers argued that a judge unfairly imposed the death penalty after a jury recommended life in prison.

The court had narrowly ruled just a short while earlier Thursday evening that the execution could proceed, although four liberal justices said they would have halted the execution. However, the court then issued a temporary stay — its second of the evening — as attorneys for the condemned inmate quickly sought a reconsideration after that narrow decision.

While the whirlwind of judicial activity unfolded, Ronald Bert Smith Jr., 45, remained steps away from the prison chamber where he was scheduled to receive a lethal injection Thursday evening for the Nov. 8, 1994, shooting death of Huntsville store clerk Casey Wilson. It would be Alabama's second execution this year if carried out.