“Do you see any need NOT to mention the race of the perps?”
Ok. What is the race and how do you know with certainty what it is?
The report says there was video from store security cameras. The video should identify the race of the miscreants.
“and how do you know with certainty what it is?”
I'm not sure what you're getting at here. If you're asking how you identify a mixed race perpetrator, then I suggest you can call them part black, part white, of Anglo-African.
However, in most cases I suspect it will be pretty clear what the race of the perpetrators is.