Miller, a forensic psy- From Difficult to Disturbed: Understand- Managing Dysfunctional Employees, economic stress alone won't turn someone into a killer, nor is the average co- worker likely to turn violent without warning."People shouldn't be sitting around wondering if someone they've been working with for years who's been a regular guy [with] no real problems is going to suddenly snap and go ballistic on them" says Miller. "It's usually somebody," he warns, "that's had a long streak of problems." Unfortunately, that profile fits Jason Rodriguez, who'd been struggling for years with marital and mental-health oblems, unemployment, debt, and smoldering anger. He as a very, very angry man,"reports his former mother-in-law. HINK IT OVER Have you ever experienced a case of workplace violence