Florence, December 6 - A Florence man was arrested Thursday for chopping off his father's thumb in an attempt to kill him with a samurai sword. The father, 57, was reportedly scolding his son, 21, for a window he left open the night before. The son reportedly swung the curved blade at his father's neck, who blocked the blow with his thumb. Police said tempers had been sour for months regarding the son's unemployment. Surgeons were attempting to reattach the thumb.