It's not really a secret that retail LP generally abuses their role across the board and allows prejudace to run rampant in its ranks, giving that it is almost entirely comprised of people from backgrounds that lack any higher education and recieved a few months training at best to do what they do. Heck, step in any active American mall and you will encounter mostly white men who didn't quite have the chutzpa for the police academy, but still carry the guilty-til-proven-otherwise attitude.
Source: I was LP briefly for TJX companies and left due to the rampant and accepted bigotry I encountered with them. In their case, it was that I was repeatedly told to target black women if I wanted to meet quota each month, since their own numbers said most apprehensions were black women and not one person in the LP heirarchy knew what confirmation bias or survivor bias was. Also, yes, they have quotas. I was put on their equivalent of a PIP the second month I was there for not meeting mine. We can rest assured that Kroger, Walmart, etc, use lots of the same tactics and quiet codes.