Superintendent Karyn Malthus, the Auckland City District commander, told the Herald in a statement a sworn officer has been charged after an incident allegedly occurred in Auckland last year.
The officer was on duty at the time, Malthus said.
An internal police employment investigation will also be conducted pending the outcome of the criminal court proceedings.
"During this time the officer will not be on front line duties," Malthus said.
The Independent Police Conduct Authority is also carrying out its own investigation.