"An investigation of theft by the local police exposed them to ICE...sorry about that."
It has been my experience that the illegals working for so-called "cleaning", or "janitorial" services spend more time digging through the trash receptacles for recyclables and stealing supplies such as paper towels, toilet tissues, soaps, and other materials then they do cleaning the facilities they are hired to clean. Numerous times I have been compelled to protest unsanitary facilities that are allegedly maintained by these cleaning services.
"It has been my experience that the illegals working for so-called "cleaning", or "janitorial" services spend more time digging through the trash receptacles...."
If this is the case the management of that service should be removed. The Janitorial Management where I work knows this is the type of thing that kills their business, so they fire people just being in the wrong place while cleaning the buildings. The cleaning is also to a much a higher standard.
Another thing can be done is keep the cleaning supplies contract separate from the labor contract - different Vendor and all. You can more easily monitor theft this way.