A second suspect has been captured in connection with the slaying of Joshua Brown, the Dallas man gunned down 10 days after he took the stand in the high-profile Amber Guyger trial.

Michael Mitchell, 32, was nabbed in Marksville, Louisiana, by US Marshals, the Dallas Police Department said in a late Tuesday update.

Earlier Tuesday, cops identified Mitchell as the getaway driver after a shootout — the result of a botched drug deal — went down in the parking lot of an apartment complex about 5 miles from where Guyger fatally shot 26-year-old Botham Jean last year.

Mitchell, a 20-year-old relative named Jacquerious Mitchell, and Thaddeous Green, 22, all came from Louisiana to buy drugs from Brown on Friday, Chief Avery Moore of the Dallas Police Department’s Criminal Investigation Unit said.

An argument ensued in which Brown first shot Jacquerious, wounding him, and Green squeezed off two rounds at Brown, Moore said.

Green allegedly grabbed Brown’s backpack and gun, then hopped back into the car, driven by Michael Mitchell.

Michael Mitchell dropped Green off at an unknown location before bringing Jacquerious Mitchell to the hospital, according to Moore.

Jacquerious was in custody at a local hospital, and authorities said they would issue a capital murder warrant for him. They had previously issued capital murder warrants for Michael Mitchell and Green, who remains at large, according to Moore.

Moore rejected any suspicions Tuesday that the slaying was connected to the Guyger case.

“As you know, there’s been speculation and rumors that [have] been shared by community leaders claiming that Mr. Brown’s death was related to the Amber Guyger trial, and somehow the Dallas Police Department is responsible,” he said. “I assure you that is simply not true, and I encourage those leaders to be mindful of their actions moving forward, because their words have jeopardized the integrity of the city of Dallas as well as the Dallas Police Department.”

Brown, 28 — who lived across the hall from Jean at the time of the shooting — previously fled to California after repeatedly expressing concerns that testifying in the Guyger trial would put his life at risk, according to Lee Merritt, who represents the Jean family.

He returned at the behest of prosecutors.

The slaying attracted widespread attention, with a businessman even putting up a $100,000 reward for information that would help authorities crack the case.

Guyger, 31, was convicted last week in Jean’s murder and sentenced to 10 years behind bars.