Unfortunately private security has no authority. All they can do is call the cops. I know because my wife called the security company that patrols our neighborhood and was told they’d contact the police.
In Houston the more wealthy neighborhoods hire legitimate deputy sheriffs to patrol the areas. They’re in county owned cars and wear county sheriff uniforms but are paid by the neighborhoods.
Security companies are changing. There are quite a few ‘private police departments’ around now. It’s all about accountability. If you have the means to pay, you can get your own private dept and when they don’t do their jobs, they have no union or civil service laws to protect them. I think we’ll start seeing more and more of this. Plus, there’s no long term costs like crazy pensions and health care.