Doors slamming when no one is in the room. Voices whispering when everyone is asleep. Do you believe in ghosts? Kelly and Diana Elkins certainly do. They're part of a paranormal investigation team, recording with full-spectrum cameras for hours to catch activity. They're one of multiple teams around Southern Nevada that do this. These groups join us to talk about whether ghosts are real, the things they have seen, and how they deal with disbelievers.