GGP is the owner of the mall, per the FCC database, only listing for them comes back to a mall in San Antonio Texas. Could possibly be listed under whoever the security company is.
When I worked at the RS there many moons ago one of the guys that was a shift supervisor was a ham and gave us their frequencies there (I can't remember his name and he's probably long since retired or moved on to something else). I am pretty sure it was in the UHF business band range, but I can't rightly recall if they had a repeater or not. This was about 9-10 years ago.