TIM KELLY THE man who killed Shinzo Abe believed the former Japanese leader was linked to a religious group he blamed for his mother's financial ruin and spent months planning the attack with a homemade gun, police told local media. Tetsuya Yamagami, an unemployed 41-year-old, identified as the suspect on suspicion of murder on Friday after a man was seen in videos repeatedly shown on Japanese television calmly approaching Japan's longest-serving prime minister from behind and firing. Wiry and bespectacled with shaggy hair, the suspect was seen stepping into the road behind Abe, who was standing on a riser at…