I don't think they are legally obligated to do such a thing. Police is obligated and paid for doing that.
My attitude on reading the headline of the article was skepticism that Walmart was doing less too. It doesn't make any business sense to be known as an easy mark for theft. That would attract thieves no matter where the store is located or how criminally prone their regular customers are. But I found the article quite convincing.
Doing less does not mean they are making police do it for them. I think it's opposite, Police is just pissed off Walmart does not do their job for them.
From the article,
According to laws in every state in the U.S., Walmart has a duty to protect its customers from violent crime while they’re on store property. Under an area of the law known as premise liability, victims and their lawyers have argued in hundreds of lawsuits that Walmart failed to provide enough security. To prevail, plaintiffs must prove that a violent crime was reasonably foreseeable based on a history of violent crimes at a particular Walmart. “They’re not easy cases,” says Memphis attorney Bruce Kramer, who has sued Walmart multiple times on behalf of clients who were the victims of violent crimes occurring on company property. “Proving what the duty is and the foreseeability issue is always difficult. You have a certain mindset of jurors who say, ‘Why are you holding the business responsible for the acts of this criminal?’ ”
As the article points out, Walmart maintains a database of whitch crimes are committed in which stores, so it is hard to argue that they can't foresee which stores are more likely to have violent crimes in the future and which stores require more security.
Let's see, you think that Walmart is doing less and the article establish that they have have many more calls to the police than Target. But you don't believe that they are externalizing their costs on to the taxpayer, that the police are just whiny about having to work so hard. Is this right?
And I suppose that Target is foolish for spending money on security that they don't have to, that they should just rely on the police to prevent crime in their stores?