A Florida therapist was stabbed to death by an enraged former patient who stormed into her office while she was in the middle of a session — and then later killed himself. Rebecca White, 44, was fatally knifed when Michael Smith, 39, barreled into her medical office in Orange County late Monday demanding to speak with her, WESH reported . Smith, whose criminal history involves prior raps for a sex offense and kidnapping, stabbed the therapist and then attacked her other patient as they tried to