Violent Armed Tenants and Multifamily Homes

[Jeff G.]

A few years ago a close relative rented an apartment with his fiance (now wife) and only made it about 6 months before demanding to be let out of the lease. The reason: there were several brawls in the parking lot that didn't endear the place to him. He worried about his fiance's safety. The straw that broke the camels back was when a firefight erupted on the 1st level. One of the rounds ended up striking a little old lady in the rear-end (while she was resting in her armchair) on the 2nd level and my relative was on the 3rd level.

Needless to say the landlord let my relative out of his lease in short order.

This story is both (a) true and (b) nuts, but it can't be a unique experience. Those of you on the land-lording side, what would you do / have you done to "flush" violent criminal tenants from multifamily homes?