Terror Kidnapping

Exploration Stage: Scientist's Mansion
From: Albert Wise
Description: All the evidence throughout Charles' house suggests that Avocado's crew has been kidnapping people here! A seasoned criminal would sneak around undetected. Can you help me find a muffler?
Completed: I knew you found the silencer! So we have someone who was armed, broke into Charles' house, and tried to destroy evidence. But...what did they want with Charles?