This was a next door neighbor. He moved into my dad's house when his parents passed away and after I moved out about 6 years ago. Within that 6 years he managed to move in and take over the house. The house is so dirty and unsanitary its hard to believe. Mice and roaches throughout the house. Bedbugs and mice feces all over. I've been cleaning up since I've been back, but I am overwhelmed. I need to hire a cleaning team. He has gotten very nasty since confronted. What can I do?
Call APS and tell them what you have posted here.
Best of luck to you and your father.
If Dad is competent, then he has to agree that he wants this person out. If so, you can start the eviction process. Hope you have taken pictures, a video would be best. Has the person paid Dad rent? If you don't have POA this is the time to get it. At Dads age, I would also go with an Immediate POA. This will give you some control right away.
Is it your father who's become "nasty" or the freeloader? If the former, APS could get involved, and perhaps take action to eventually remove the freeloader. If it's the freeloader who's nasty to you, his actions and inactions are jeopardizing your efforts to address your father's health. That's also an issue for APS, since it could be considered elder abuse.
You might also call the IL state offices to determine what resources are available. I would think a state the size of Chicago would have some elder law resources. And the state might even have more support than local authorities.
I would involve local authorities if you believe your father is not quite competent and believe that this person is taking advantage of him. Call APS in your area.