Moore said authorities have identified three suspects in the murder of Brown on October 4th and two are still on the loose.
Moore said the murder happened during a drug deal and Brown was shot in a Dallas parking lot. All three men were issued capitol murder warrants.
Brown was a neighbor of Botham Jean, whose death sparked street protests last year, particularly when prosecutors initially opted to bring the lesser charge of manslaughter against Guyger.
Guyger was sentenced to 10 years in prison on Wednesday (October 2) by a Texas jury that found her guilty of murder for walking into a neighbor's apartment thinking it was her own and shooting him as he ate ice cream.
The jury came to its verdict in less than six hours on Tuesday (October 1), convicting Guyger, who is white, in the 2018 killing of Botham Jean, a 26-year-old black PwC accountant.
Moore said Brown's murder was not linked to the Guyger trial.