in Southampton
In some places, it is a crime to not report a crime if you have knowledge of it and fail to report it. This is known as "failure to report a crime" or "misprision of a felony." It is important to check the laws in your specific location to understand the requirements.
It's a crime, so you report it like any other crime--call the police. Anyone can report it.
Report crime to the nearest police officer you can find. Once you tell the officer that you have witnessed a crime, he will help you explain what happened and ask you about details that will help them investigate. If you cannot find a police officer, or are too young to get to a police station yourself, bring it to your teacher, a parent, or other authority figure.
You can find an overview and a link to the Jeanne Clery Report (Crime Security and Awareness Report) on the related links below.
(in the US) Probably the UCR (Uniform Crime Report) which is compiled, produced, and published by the FBI's National Crime Information Center.
In Texas, failing to report a crime can result in being charged with a misdemeanor offense. This means that individuals who do not report a crime they are aware of could face legal consequences and potential penalties.
"Did you report the confessed crime to the authorities?"
The crime should be reported wherever the crime occured.
Your local police department can handle the report.
Dial 911 and report the crime.
You don't, you report it to your nearest police station.
Report it to the police and hope it turns up in a pawn shop or at a crime scene.