Your description is a little terse - are people apprehensive because of: 1) tales of his living at the office and off-hours outbursts, or 2) problematic interac

Your description is a little terse - are people apprehensive because of: 1) tales of his living at the office and off-hours outbursts, or 2) problematic interactions directly with other employees. If the latter, you likely should act to separate him from the other employees even though this will likely increase the odds of a bad outcome for him - the needs of the many and all that. If it's the former, it sounds like unstructured time alone might be his trigger (or, he could just need to 'pop off' for X hours a day regardless of environment). If it is unstructured alone time, it might be possible to put enough structure into his life that he's a lot more stable. Getting him evaluated and maybe set up in some sort of halfway house might be a good longer-term solution. But it's probably going to be rough and depend a lot on how much you want to invest in this person. He sounds like he's likely schizophrenic and it's usually a roller coaster ride; you can have months of relative stability and then things go off the rails, there are outbursts, police are called, housing goes away, they go back to living rough, and then maybe things settle down and they can climb back up the ladder a bit until the next time or until they die. My biological father's life was like that (I was adopted at birth and didn't meet that side or learn about him until long after he was dead). Anyway... Yes, he might be a threat. Have a plan; have several plans. Especially have mental health crisis numbers handy and try to avoid police unless there's an imminent threat to human life. Check with your lawyer and insurance about how liable you are with him living there. Try to gently walk him towards mental health resources and other support structures. Maybe work out some sort of buddy system where there's rotating 'Jake duty' to touch base with him once or twice an evening to make sure he's ok. But it's a lot, and this is free advice from the internet, so handle it accordingly.