computer stolen, now the messenger is online

[steviej1717]

Ok so my sister got her laptop computer stolen yesterday. She had msn messenger on it programmed to sign in automatically when the computer turns on. Now today I see her signed in to her messenger, but I called and she said she didnt have it back.

Is there any way to get the ip number so I can see who it is, or where they are?

Or should I just call the cops and let them know?

Thanks.