The Blue Butterfly

Jack Lord and Belle were sitting in the office having a coffee, and donuts of course, when the telephone rang. It was police chief Bill Smart that called and wanted the two. An agent Ross from FBI have been looking for you guys, and I promised to find you for him. He want to see you in his office. Jack, and Belle drove up to the FBI's local office. Arriving there, agent Ross told the two that another FBI agent, Will Dart had recommended Belle for a dangerous assignment. Coming back to their own office and opening the envelope agent Ross had given them. Looking at the information, Belle said, "I have a feeling we should look at 1212 North Street. Now when Donna and Sandra Lander are in jail, their house would be a perfect hiding place for any criminals." The two decided to go to the North Street address first. "Did you br4ing the bullet-proof Wests?" asked Belle as they carefully moved towards Donna Lander's old address. Moving carefully closer, Belle saw someone cleaning a rifle through the window. They called the police, and in a few minutes the area was surrounded, and the police shot in smoke, and teargas-grenades. When Alice Lander, the Blue Butterfly came home, she could smell the teargas. "They have taken my elite crew," she said. "I will vengeance the boys." The following day, there was a bank robbery, all the staff and some customers were all killed. Five more banks were robbed, and the entire staff, and customers were killed. Inside each bank the police found a card, with a blue butterfly. Someone in agent Ross office must have given information to these cold blooded killers. Yes, one did, but who, and how did they catch this person?.