Awful tenant- need opinions!

[Emily McCabe]

I have a tenant in a 3-unit building who has been having angry outbursts and scaring our other tenants. We sent him a warning letter (at our lawyer's suggestion) after a bad outburst about a month ago. Ultimately we'd like to get rid of him, but our lawyer thought it was best to send a warning first, and then if we get another complaint, we can send him a 30-day notice. We haven't had any other complaints for the past month except for one saying he was "slamming doors". Then today, my husband went over there to mow the lawn, and the tenant came out complaining about one of the other tenants (a young woman) and ended the conversation by saying "This ends today!" and walking away. Would you interpret that as a threat? Should we be concerned? We are giving the lawyer another call today, but I was hoping for any suggestions or reassurance from other landlords as this whole situation is stressing me out (I'm also 9 months pregnant which doesn't help) and we're not really sure what to do.