You are right. There is a great post about the questions to ask. I have never been able to find anything in the archives.

One thing you can do to eliminate facilities is to ask via telephone what the training program is. You want trained staff !  The training should be for new staff as well as ongoing and you should be able to look the program up online. Do not settle for "oh, our staff is well trained" or "we have our own program".

Another thing you can do is to look at a copy of their license application which will list in black and white the services they provide.

I can't help with the archive either, sorry. To add on to jfkoc's comment, I would add, ask whether they have aides with experience in dementia. 

Good luck.

 https://www.alz.org/media/documents/alzheimers-dementia-choosing-in-home-provider-ts.pdf

Even if they say we order criminal background and driving records, make them give you the dates of the last one for that person in their file before you interview them . The office staff maybe so eager for a placement bonus they skip that step.