A Thames Valley Police officer has admitted using force computers to access confidential information before passing it on to his father.
Matthew Oaten pleaded guilty to three counts of computer misuse and two of breaching the Data Protection Act.
Winchester Crown Court heard the offences, some of which were committed while he was on duty, happened between February 2013 and May 2015.
PC Oaten, 30, is stationed at Banbury, Oxfordshire but is currently suspended.
He was bailed to return for sentencing on Monday.
The court heard the data protection charges related to sending sensitive witness protection information and police operational data by an insecure email to his father.