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Today, I called into work because of a family emergency. My boss was understanding; my coworker? He tore me a new one because his wife wanted him to take the day off, which he didn't because it was going to be a tough day at work. He also threatened to find a way he could get me fired. FML
Screenshot the discussion if you can and show your boss, also go to HR and make a formal complaint about your coworker for harassment.