Stephen Parkinson, Director of Public Prosecutions, said: "Criminal prosecutions brought against police officers for actions taken in the course of their duties are extremely rare and these decisions are only made after careful consideration of all the relevant evidence and circumstances.

"It is crucial that police officers are able to use their powers with legal certainty and clarity, always balanced with the public’s need to see the highest levels of scrutiny and accountability.

Robert Emmerson, 40, was sentenced today at Manchester Crown Court to four years and six months in prison. He was also made the subject of a sexual harm prevention order for life. 

The facts of the offences can be found in the CPS North West press release on conviction.