So I have an unusual situation on my hands. My dad has a very fixed idea in his mind right now that I have stolen his stock certificate. I've never even seen it, but that's beside the point, and makes no impact on his thinking since this is delusional. He's called me more than 50 times in the last day or so, each time he threatens me with calling the police. But next time he might pick up the very real phone and make a very real phone call to the police to report a nonexistent theft. Should I call them to tell them what's going on? He's done this before, a couple of years ago before he started being seen by doctors for his Alzheimer's, and I had to speak to the sheriff (they called me to ask me what I thought, since my mom had told the sheriff that he has dementia). I feel like it would be a good idea to call them myself but I don't know what they would do about it, or even what they could do. Has anyone been through this?