In 2014, police were called to Tampa-area Walmart stores (this counts all stores in the region) about 16,800 times - this is in one year. To break this down, you'd get two calls an hour, every hour, every day of the year. That's massive - Imagine all that theft - I am surprised that they are not closing all stores since they have so much theft. Here is the report on the losses:
http://www.businessinsider.com/walmart-theft-threatens-profits-and-police-2016-6