Private police forces

Thought this was interesting.

A few days ago, i was watching the news when they aired a story about businesses forming thier own private police forces. I searched the channel's website, WECT, but couldn't find anything about it.

Now they're not just your run-of-the-mill security guards. These people have full arrest rights. they look very much like ordinary police men/women. Anyone have any thoughts about this?

In the united States all Security guards have "full arrest rights", so do you.
In the United States many Security Guards look like Police men/women.
In the United States many Security Guards can carry firearms.
In the United States all Security Guards are employed as private security forces.