Three men have been indicted on capital murder charges in the slaying of Joshua Brown, a witness in Amber Guyger’s murder trial for the slaying of Botham Jean.

A Dallas County grand jury handed down the indictments Thursday for 22-year-old Thaddeous Charles Green, 20-year-old Jacquerious Mitchell and 32-year-old Michael Diaz Mitchell.

The Mitchells — who are uncle and nephew — are being held in the Dallas County jail. Green remains at large more than two months after the fatal shooting.

From left: Thaddeous Charles Green, Jacquerious Mitchell, Michael Diaz Mitchell. (Dallas Police Department, Dallas County Sheriff's Department)

Brown, 28, was shot Oct. 4 outside the Atera apartments in the 4600 block of Cedar Springs Road, near the Dallas North Tollway, where he’d moved after Jean’s slaying at the South Side Flats near downtown Dallas. He died later at Parkland Memorial Hospital.

Brown had testified just days earlier in the high-profile murder trial of Guyger, a former Dallas police officer. He lived across the hall from Jean and told the jury what he had seen and heard the night of Sept. 6, 2018, when Guyger shot Jean while she was off duty but still in uniform.

He had just returned to the building after watching a football game and was standing in the hall when he heard what sounded like two people meeting by surprise, followed by gunfire, he testified. After running for safety, he later returned to his apartment and watched through the peephole as Guyger talked on her cellphone before officers arrived.

Brown broke down in tears as he told jurors that he’d met Jean that morning but had often heard him singing Drake songs and gospel music.

The slaying so soon afterward fueled rampant speculation online that Brown had been killed in retaliation for his testimony and that perhaps Dallas police had been involved. An attorney representing the Jean family in a civil case tweeted that Brown had been shot in the mouth before later walking that statement back.

The Dallas Police Department forcefully rejected the rumors, saying in a tweet that anyone sharing them should “be mindful because their words may jeopardize the integrity of the city of Dallas and DPD.” Police also said Brown had been shot multiple times in his lower body.

Four days after Brown’s death, Green and the Mitchells were announced as suspects in the slaying, which police said was the result of a drug deal gone bad.

According to arrest warrant affidavits, the trio had rented a car and driven about 300 miles to Dallas from Alexandria, La., to rob Brown, who thought they were there to buy drugs from him.

After they got to the apartment complex, Green got out of the car to talk to Brown and the two started arguing, police said.

Jacquerious Mitchell told officers that he got out of the vehicle and Brown shot him, then he heard two additional shots as he fell back into the car, an affidavit says.

He said Green got back in the car with Brown’s gun and a backpack containing marijuana, and then Michael Mitchell — his uncle and the driver — dropped him off at a hospital. Green told him to lie about the details of the shooting, police wrote in an affidavit.

Witnesses reported seeing a silver sedan speed away from the apartments after the shooting. Police said a silver 2020 Kia was returned to a rental company in Alexandria two days later.

Officers responding to the shooting reported finding a holster in Brown’s waistband but no gun. In his apartment, they found 2 pounds of marijuana, 143 grams of THC cartridges and $4,000 cash.

Jacquerious Mitchell was taken into custody at Parkland Memorial Hospital. He has since been transferred to the Dallas County jail, where his bail is set at $500,000.

Michael Mitchell was arrested by U.S. marshals in Louisiana on Oct. 8. He is being held at the Dallas County jail, with bail set at $500,000.

Green remains at large and is considered armed and dangerous.

Anyone with information about the shooting may contact Detective Jacob White at 214-671-3690 or jacob.white@dallascityhall.com.