My ex-partner and I lived in their grandfather's house for a little while after he passed away. There were places we were not allowed like one storage room and the attic. We would often hear a radio come on in the attic and go off at various times and the occasional loud thump, and most weird was almost like sobbing, but we assumed it must be the old radio plugged in up there. Also every now and then his dad would "need to get into the attic" for no reason. The only access was on the outside of the roof through a trap door that was padlocked. My ex's birth certificate had an discrepancy on it that he had 3 siblings even though he only had 2. His mom said they just made a mistake, but he was 90% sure that his hidden sibling was living in that attic. I used to think it was a running joke, but looking back I think he was at least a little serious and I don't put it past his parents. They were completely insane and I'm glad he hasn't had contact with them in years (we're still friends). So roaches, def, roaches. Thanks for coming to my Ted Talk.