Nottinghamshire Police is being investigated by the police watchdog into how it handled the case of missing teenager Amber Peat.
The Independent Police Complaints Commission says it's looking into how officers responded to reports of public sightings.
The 13-year-old was found hanged less than a mile away from her home in Mansfield on June 2nd.
The force says it referred itself to the IPCC as part of standard procedure. It said: