FORT LAUDERDALE, Fla. — Four people have been arrested and charged with helping a murder suspect pull off a daring escape from a Florida courthouse Friday in a well-planned operation that included a fake police uniform and twins acting as accomplices, authorities said.

But Dayonte Resiles, the 21-year-old accused of stabbing a woman to death, remained on the loose Sunday.

Broward County Sheriff Scott Israel said Resiles' 18-year-old girlfriend, LaQuay Stern, parked her silver BMW under a bridge next to the Broward County Courthouse on Friday, where she waited with Winston Russell, 22.

Meanwhile, two 17-year-old twin brothers went into the courtroom where Resiles was awaiting a hearing on whether he would face the death penalty in his upcoming trial on charges that he murdered Jill Halliburton Su, a member of the Halliburton business family, during a home invasion robbery almost two years ago.

As Resiles slipped out of his handcuffs and ankle shackles and broke for the door, Israel says at least one of the twins coughed into a cellphone to signal Stern and Russell that he was on his way.

Resiles, while in the hallway, shed his jail jumpsuit, fled out a courthouse door and into Stern's car, Israel said. There, Russell gave him clothes and kept for himself in a bag a generic police uniform, Israel said. The uniform's purpose is unknown, Israel said.

Stern and Russell then drove Resiles to an apartment from which he disappeared, Israel said.

He said the search remains focused on South Florida but a nationwide alert has been issued. Rewards totaling $20,000 are being offered for his capture.

“The fact that Resiles remains at large tells me there are more people aiding and abetting him in his escape,” Israel said during a news conference.

He said that the manhunt for the suspected killer was being hampered by people in the community who have failed to cooperate with authorities.

In custody are Stern of Palm Bay; Russell, of Sunrise; and twin brothers from West Palm Beach.

Stern and Russell were taken into custody late Saturday in Deerfield Beach, according to the Broward Sheriff's Office.

The brothers were arrested in West Palm Beach.

According to arrest documents, the escape was planned during several phone calls and visits Resiles had with Stern and Russell.

The documents say Stern and Russell confessed and laid out the plan to investigators.

Stern and Russell are charged with escape and accessory after the fact to capital murder and are being held without bail at the Broward County Jail. The twins face the same charges as juveniles.

Stern and Russell are scheduled to make a first appearance in Broward court Monday. The twins were in the custody of juvenile authorities in Palm Beach County, Israel said.

Israel said that while there is no indication Resiles received help from a guard or other law enforcement agent, an internal affairs investigation has been opened. He said one area of focus will be on how Resiles was able to shed his restraints.

“There is only two ways to get out of cuffs — either they weren't put on tight or you have a cuff key,” he said.

Resiles faces murder charges in the September 2014 killing of Su, grand-niece of Halliburton Co. founder Erle P. Halliburton.

Associated Press contributed

mwclary@sun-sentinel.com