Former police chief Duncan McCausland is released following fraud probe quiz
Former PSNI Assistant Chief Constable Duncan McCausland, arrested as part of an investigation into the awarding of a number of PSNI vehicle contracts, has been released pending a report being sent to the Public Prosecution Service (PPS).
Speaking after his release the former police chief said he had been treated with the utmost professionalism during his lengthy questioning and understood the police had a job to do.
Mr McCausland now works as a security and justice consultant.
A solicitor for the 54-year-old said there was no need to arrest him as he had volunteered to assist the investigation, and strongly denies the allegations against him.
A 37-year-old police staff member was also freed pending a report to the PPS. He has been suspended from duty.
Detectives from the Serious Crime Branch have been granted more time to continue to question four other men arrested on Tuesday in Northern Ireland and England.
A 71-year-old man arrested in Co Down yesterday morning also remains in custody.
Searches were carried out at premises following the arrests in counties Antrim, Down and Tyrone.
A number of items were seized and taken away by police.