Crowds flee for cover outside New York’s Empire State Building as gunfire leaves two dead

He said he had never been inside Johnson’s one-bedroom apartment on the second floor of an unassuming, six-story building that also houses a pet grooming shop and a massage-therapy studio.

Casella said she frequently heard early-morning vacuuming coming from Johnson’s apartment, and persistent meowing.

Carolyn Reinach Wolf, an attorney who specializes in cases involving workplace violence, said it is unusual for an angry ex-worker to wait a year before lashing out against a former employer. But she said people sometimes stew over what has happened “until they reach a boiling point, while with others there is a triggering factor which causes the individuals to become violent.”

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(c)2012 Los Angeles Times