Bedbugs Not Disclosed but present and known

[Montana M.]

keep in mind reading this post that I have learned and pieced things together over 2 months, so this sounds like a "well you should have known he was a shady guy" situation, but it was too late by the time it was clear... I bought my first investment in Louisville KY, a 4plex, from a guy who inherited the unit from his mother. He has some mental issues, but had lived in the home for 15 years and acted as landlord for some or all of it. He disclosed nothing and claimed probate on the entire disclosure. Prior to the sale I found that tenants had no heat, roof was "replaced" (not his fault the roofing company billed for more than the did," and a tenant recently punched the owner. All seemed ok since he seemed to not understand anything. 2 weeks after closing I finally got him out and was cleaning his apartment and found many bedbug treatment chemicals, I asked him about them and he said "about a month ago I had a problem in my unit and another, but I treated them." I didn't trust him so I called the exterminator and he found there are still bedbugs in the other unit. I told the former owner he needed to pay for an actual exterminator and  he hasn't said anything since. I'm in contact with his realtor. But I need some advice for moving forward.