Tenant lost job, with red flag

[Yiv L.]

One of my tenants on one of multi-units, who had trouble paying rent sometimes in the past, lost his job two months back. I called his employer and confirmed that. I know he lived on paycheck to paycheck. The problem is he has been continuing to pay rent and has no pressure to get back to work. Other tenants on the same complex mentioned that there are visitors in and out of his unit. This worries me, as it indicates probably something fishy he has been doing to keep afloat. I would like to get rid of him before something really bad happening to my property. He still has 5 months on the lease. I don't mind to have him breaking the lease, and even give back all of his security deposit. What recourse do I have?