The murder of a witness in a major trial is very concerning. Just like the murder of Botham Shem Jean we have the same exact problems at play. Who will do the investigating? People love to talk about how votes don't matter and Donald Trump and Obama are the same. If Obama was President Dallas PD would be under investigation for Civil Rights abuses and racial bias, and there's a strong chance that the FBI would have taken over both the investigation of Amber Guyger and this investigation. Instead we have police officers investigating police officers. If you don't think that police officers have solidarity think again. They all protect each other. If this was retaliation for Mr. Brown testifying against Amber Guyger don't be surprised if members of the Police Department try to sabotage the investigation.
In addition, be ready for the usual smear tactics. Mr. Brown used drugs...Mr. Brown was a thug...Mr. Brown had nefarious connections and interacted with criminal underworld. Whenever something like this happens and police are afraid of blowback, they attack the victims character. The only thing people who want justice have going for them is that this investigation will receive national media coverage. Only time will tell if it will be enough.