A Florida man is facing a second-degree murder charge after police say he fatally stabbed a coworker who refused to date him. Delfina Pan, 28, worked at a Miami Beach restaurant with the suspect, 20-year-old Agustin Lucas Mariani. According to a police report obtained by NBC Miami, Mariani made several attempts to begin a relationship with Pan. She rebuffed his attempts. According to the police report, Pan left the restaurant on Nov. 29. The report alleges that a short time later, Mariani left the restaurant in the middle of his shift and showed up at Pan's apartment. When she refused...