How in the hell does Don Clericuzio and his top officials fine things out with out?

1. Like how did they know about Cross and his henchmen having anything to do with the death of Skannet? Or his involvement in getting into the movie business?

2. How did They find out That it was actually Cross who killed Dante without any proof or evidence?

3. Also Did Don Clericuzio actually believed that Pippi was shot by a mugger? I don't think he did. He is a wise man and smart enough to know that Pippi is too dangerous for even a mugger to conquer over