They stopped paying for the security system without telling the tenants.

This I believe is the third time I am hearing this. Once a friend of mine - found one day his system for some reason was not working. He called the company in Houston to get it fixed, got an appt for next day; the same day - when he went to drop his kids to the school/run errands - in 1 1/2 hrs his house was cleaned out.

If you cannot trust the workers at the security company ....?