Prison officials have rescheduled the execution of Manuel Valle for Sept. 6.
The 61-year-old death row inmate was convicted of killing Coral Gables police officer Louis Pena during a traffic stop 33 years ago.
Officials rescheduled his execution Wednesday, a day after the Florida Supreme Court lifted a stay.
The justices rejected Valle's claim that a new lethal injection drug may cause him to feel pain.
Valle had been set for execution Aug. 2, but the Supreme Court ordered the stay so a judge could hear evidence about the new drug.
His death warrant is the first that Gov. Rick Scott has signed since taking office.
Florida uses a three-drug cocktail for lethal injections. One of those formerly used had to be replaced because it no longer is available.
