Tenant harassed by other owner in HOA

[Levi Davis]

We have our dream tenant (clean, quiet and never late with rent) in a small, four-unit condo building. She called us today in tears because her upstairs neighbor, a man who owns the upstairs unit, has been yelling at and harassing her for seemingly little or no reason. We are coming to find out this man is known in the neighborhood as a tyrant who aggressively confronts neighbors over inconsequential matters. He is also known to harass renters more than other owners (probably because they have less political power). This man has also been head of the HOA for many years.

This is upsetting for two reasons: (1) because our tenant is a good person that doesn't deserve to be mistreated, and (2) that this abusive neighbor is going to drive good tenants away, affecting the value of our investment.

Any advice would be greatly appreciated.  Thank you very much.