If this were a random shooting that resulted from the victim bursting in on a crime in progress, there would be signs of a panicked exit with random pieces of evidence left around the crime scene. Instead, it seems to be perfectly devoid of evidence, possibly including shell casings, meaning a remarkably quick and careful cleanup or that the assassins deliberately used a revolver, a handgun that does not automatically eject spent cartridges. Even the mixed race makeup of the hit team suggests an assassination, terrorist groups like BLM being so often composed of radical blacks and whites.
Anything is possible. In my experience, whites and blacks together usually means dope deal, and the Lt. might have interrupted it.
Someone will come in on this. It’s human nature to talk.