Earlier this week, a former employee at solar products manufacturer Emcore Corporation in Albuquerque, N.M., walked into the business and opened fire, killing two people and wounding four others before turning the gun on himself. Police say the gunman, later identified as 37-year-old Robert Reza, was involved a bitter dispute with his ex-girlfriend over custody of their children.

Obviously, incidents of workplace violence are something that security managers work to prepare their organizations for through numerous methods, be it early detection of warning signs exhibited by employees or though the implementation of security technologies and personnel that can serve as a first layer of defense.

However, the Albuquerque shooting begs the question of what companies can do to account for circumstances and issues that are potentially out their control?

In this "At the Frontline," SIW speaks to Felix Nater, president and owner of security management consulting firm Nater Associates, for his take on this incident and what businesses need to do to be better prepared to prevent acts of workplace violence.