I have a question... in the garage, where the CSI's park the cars, do they have surveillance camera's there?
I'm not sure what you mean by this ... sorry But I'll try to give you a general answer : anywhere that has evidence ( case folders, murder scene cars ...) will be secure, in order to prevent any breach of security. So yes, if that's what you meant, they will have secrurity cameras, but then again, most parking lots do ...
They'll have camers both in the garage they use for their personal cars, and the one they use for evidence in the form of cars. It's generally very secure, but the cameras wont be those hight tech ones that follow movement or anything, just standard surveillance cameras.