"Ghost Caller"? Can anyone tell me about this internet hacking program?

[kickingthehabit]

There is a wanted ex-convict who is making calls to other houses but their caller IDs are showing up as us as the caller. An ex-friend (who we believe to be the person in question) is hacking somehow and our ID is showing up at another house. We have called the phone company and they told us that there is a new program called Ghost Caller that uses whatever other phone number you choose as a mask when you call others.

Cany anyone tell me more about this? We have called the police and the phone company says that tapping a phone line is not illegal and they might be hacking through the internet.