My iPhone 4s was recently stolen, can i trace it?

Can i trace my stolen iPhone 4s? I have a fair idea of the person responsible although i can't prove it.
can anyone help me?

If you have the "find my iphone" app installed and registered, you can track it, and report it to the authorities, otherwise you are out of luck.

You can go on iCloud.com, click find my iPhone, and it can track it if it's on

Somebody posted a question I found iphone 4s I threw the sim but it has a password lock
Maybe he has lol
you can't track it down if phone is off