Spend a day observing in your eviction/ unlawful detainer court.  

The Constable will serve the forceable detainer paperwork as ordered by the courtCertified mail is acceptable or if in person or taping to the door you can record with your phone

There's already legal precedent with private security firms not being allowed to detain people such as suspected shoplifters.

It however ended in a eviction and unlawful detainer and sheriff lockout and us storing the household goods and disposing of stuff.Most important... know and follow the landlord-tenant laws for your jurisdiction.

You may start looking elsewhere for housing as a backup plan.Google "Texas Property Code Chapter 92, 91, and 24" for info on residential leases, termination periods, and forcible entry/detainer.

No response after the 3 days, move toward an unlawful detainer. 

The only way out out is Unlawful Detainer and the so-called squatter / trespass approach rains down on the owner, not the squatter.Bottom line, you have to know your State's Landlord / Tenant regulations and it's painful to do so after the fact.

I issued a 5 day pay or quit on the 9th and I am prepared to get a unlawful detainer once the 5 day period has expired.

I know that the cause of action in Oklahoma is called a Forcible Entry and Detainer (FED), and that you file the action in small claims court.  

., in florida now, you have an unlawful detainer action and there is still a due process, attorney is needed and there is no throwing someone out on your own, that is not going to happen or you'd lose alot more than you lost now. we buy properties like this and pay for the attorney.