Earlier quoted context omitted.
Even in the ultra-liberal Bay Area my Walgreens, Target and Best Buy employ armed security. I find it doubtful that Texas of all places doesn’t have armed security. (Oddly I’ve only seen unarmed, tired looking security in CVS. Perhaps they’re too cheap to pay for armed gaurds.)
The only time I’ve seen an armed guard at a retail store in the southeast is when they have off duty cops late night at very high crime locations. It is extremely uncommon here for a Target or Best Buy to regularly employee armed security.
It's not ever really geared at shoplifters though, as a lot of people seem to forget that shoplifting isn't really the biggest crime you can do in a store.