A 46-year-old female police officer from Scotland Yard's Diplomatic Protection Group was arrested over alleged leaks to the media linked to the Andrew Mitchell "plebgate" affair, the Metropolitan Police said.
A 46-year-old male officer arrested yesterday has been bailed to return on a date in March.
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A mother feared to have been planning to travel to Syria with her four children has been charged with child abduction.
Dimitri Diatchenko was sentenced to 60 days community service after eating the animal and sending his ex graphic photos of what he did.
The starving toddler has been taken into care following the incident in Chile - but it is thought the dog may well have saved his life.