Let me see if I have this correct. We have agents of the State stationed at private business establishments? If they are not agents of the owner or management how could they ask you to leave?
You have it incorrect.
We have state police at a state regulated gaming facility as well as state gaming agents at these facilities as well, it is defined in the license of the gamining facilities.
In other words, the casino's have to pay the state for the licensed state police officers to be there, they have to maintain the holding facilities there and all cost to of it themselves, there is no tax payer cost, but the folks you see in uniform are indeed employees of the state not the casino aka REAL COPS not rentacops with a license to carry a firearm as a rentacop. They can and will arrest for any violation of state or federal law and their orders carry just as much weight as any police officer on the street.
That is a sizable difference from your standard mall cop who has no recourse beyond telling you to leave and calls the cops if you do not and then you must leave when the real cop says so or be charged.
You can not be charged with resisting arrest from a mallcop you certainly will be from the state police officer at a casino in MO. This would pply to a brownie acting as security their powers are some what limited.
I may be saying this in some technically incorrect manner but let me be perfectly clear, the security inside the casino is "the Missouri gaming commission" and the gaming commission is overseen aka a division of "the Missouri Highway patrol" aka very real cops. The security guys in the parking lot are just that, security guys, but the ones on the inside are LEO's.