A man dubbed the “ninja killer” who murdered a couple more than three decades ago is scheduled to be executed in Florida Wednesday.

Louis Bernard Gaskin, 56, will be executed by lethal injection at 6 p.m. after he was convicted of killing Robert Sturmfels, 56, and Georgette Sturmfels, 55, on Dec. 20, 1989. He was convicted of first-degree murder.

Known as the “ninja killer’ because he donned all-black ninja clothing when he shot and killed the New Jersey-based Sturmfels inside their winter home in Flagler County with a .22-caliber rifle, investigators said.

During the double murder, a clock, two lamps and a videocassette recorder were all stolen and later found at Gaskin’s home. They were to be Christmas gifts for his girlfriend, investigators said.

Gaskin was also convicted of armed robbery, burglary and the attempted murder of another couple who were nearby the same night.

Gaskin confessed immediately and told a psychologist before his trial he understood what he was doing, local media reported then.

“The guilt was always there,” Gaskin said. “The devil had more of a hold than God did. I knew that I was wrong. I wasn’t insane.”

A jury recommended the death sentence by an 8-4 vote in 1990 that was accepted by the judge and state and US Supreme Courts have tossed any appeals Gaskin has filed with the latest denial coming Tuesday.

Current state law requires a unanimous agreement by jurors for the death sentence but a bill could be sent from lawmakers to Gov. Ron DeSantis this week that would allow an 8-4 jury recommendation to be enough for capital punishment.

The Republican governor has ramped up death warrants in the state this year after only two people were executed in his first four years in office.

Gaskin’s death, which comes six weeks after convicted killer Donald Dillbeck, 59, was put to death, will be Florida’s 100th execution since the death penalty was reinstated in 1976.

Another execution is scheduled in three weeks. Nearly 300 inmates are on death row in the state.

With Post wires