COEUR d’ALENE — Police arrested three local teens in connection with the fatal shooting of 20-year-old Gabriel R. Casper.

Vadin K. Bartlett, 18, of Coeur d’Alene, is charged with attempted robbery, conspiracy to commit robbery and burglary, all felonies.

A 17-year-old boy from Coeur d’Alene was arrested on the same charges, while a 17-year-old Hayden girl was charged with attempted robbery and conspiracy to commit robbery.

The three teens were taken into custody late Monday, after police obtained warrants for their arrests.

Five suspects are now in custody on charges related to the deadly shooting.

Police responded May 31 to the area of 23rd Street and Coeur d’Alene Avenue, where a motorcyclist had come across a man, later identified as Casper, on the road in a pool of blood.

Neighbors attempted to render aid before first responders arrived but could not find a pulse.

Casper was later pronounced dead at Kootenai Health.

Witnesses in the area said they saw a red Jeep speeding away from the scene after gunshots rang out.

Bartlett and the other teens identified themselves to law enforcement as friends of Casper’s.

The trio reportedly told police that Casper had planned to steal drugs from a Spokane dealer, later identified as 19-year-old Matthew J. Holmberg.

According to prosecutors, Casper had arranged to meet Holmberg and 23-year-old Liberty Lake resident Dennen T.G. Fitterer-Usher in Coeur d’Alene to purchase illegal pills.

Bartlett and the 17-year-old boy agreed to help Casper steal the drugs, while the 17-year-old girl agreed to be the “getaway driver,” according to reports.

Prosecutors said Bartlett and Casper were both armed with handguns when they got into the back of Holmberg’s vehicle, a red Jeep Wrangler.

In Idaho, entering a vehicle with the intent to commit any theft or any felony is considered burglary.

Casper and Holmberg allegedly struggled over a duffel bag containing drugs.

Fitterer-Usher, who was in the front passenger seat, allegedly pulled out a handgun and fired at the three people in the back seat.

Bartlett and the other teen told police they scrambled to get out of the Jeep and ran.

The teen girl, who was waiting in a truck nearby for her friends to return with the stolen drugs, said she heard gunshots and saw a red Jeep racing from the scene.

Police said the teens identified Holmberg as the dealer.

The day after the shooting, Fitterer-Usher reportedly contacted law enforcement and said he killed Casper in self defense.

When interviewed by police, Fitterer-Usher said Holmberg had asked him to accompany him to a drug deal in Coeur d’Alene on May 31.

He said Casper and another person got into the back seat of Holmberg’s Jeep and almost immediately pulled out handguns.

Fitterer-Usher said he drew his own gun and fired, shooting Casper in the head.

Casper sustained gunshot wounds in his head, chest, back, arm and hand, according to court documents.

His body was hanging out of the vehicle as Holmberg fled the scene, police said, and fell out of the Jeep at 23rd Street.

After that, Fitterer-Usher said, he and Holmberg drove to Smelterville to change their bloody clothes. They also attempted to clean the blood from the interior of the Jeep.

Holmberg is charged with conspiracy to deliver a controlled substance, a felony.

Fitterer-Usher is charged with conspiracy to deliver a controlled substance and with destruction of evidence, both felonies.

Both remain in jail on $1 million bond.

Prosecutors said in court Tuesday that Bartlett’s actions “directly resulted” in the death of Casper.

Judge Daniel McGee ordered Tuesday that Bartlett be held on $500,000 bail.

He also issued a no contact order between Bartlett and Holmberg, Fitterer-Usher and one of the other teens.