Police identify 3 suspects in murder of Guyger trial witness

Police Tuesday identified three suspects in the murder of a key prosecution witness in the murder trial of former Dallas police Officer Amber Guyger, who was convicted in the shooting death of her unarmed neighbor.

Assistant Chief Avery Moore said at a news conference Tuesday that three men from Alexandria, La., Jacquerious Mitchell, 20, Michael Mitchell, 32, and Thaddeous Green, 22, will face capital murder charges in last Friday's killing of Joshua Brown.

Moore says the three were in Dallas to buy drugs from Brown, who was shot to death at an apartment complex.

Brown, police said, shot Jacquerious Mitchell in the chest and then Thaddeous Green shot Brown twice in the lower body.

He says the killing was not tied in any way to Brown testifying in Guyger’s trial.

Jacquerious Mitchell is in custody at a hospital to which the other men drove him after the shooting.

The other two men are at large.

Brown lived on the same floor as Jean and testified about what he heard the night Guyger killed him.

In a search of his apartment, officers found 12 pounds of marijuana, 149 grams of THC cartridges and more than $4,000 in cash, police said.

“The rumors shared by community leaders that Mr. Brown’s death was related to the Amber Guyger trial and that DPD was responsible are false," police tweeted.

Dallas Mayor Eric Johnson issued a statement in which he expressed thanks to investigators.

"I am grateful that our detectives have taken the initial steps necessary to bring closure to this case," he said.

"I want to thank everyone who demonstrated patience and responsibly reserved their judgment while the Dallas Police Department gathered the facts regarding the death of Joshua Brown. I urge anyone with additional information about this case to come forward."

However, an attorney for Brown’s family is calling for an outside investigation into his killing.

Attorney Lee Merritt says "a cloud of suspicion" sits over Brown’s death.

He says an agency other the Dallas Police Department should investigate Brown's death so the findings will be viewed as "authentic and reliable."