A former senior police officer investigated over the awarding of police vehicle contracts will not be charged.
Retired PSNI assistant chief constable Duncan McCausland was among nine people questioned in a probe into bribery and misconduct in public office.
Prosecutors have concluded that the available evidence did not provide a reasonable prospect of conviction of any of the suspects.
It has already been revealed that West Yorkshire Chief Constable Mark Gilmore will not face charges as part of the investigation.
A Public Prosecution Service statement said: “The PPS today has confirmed that eight individuals will not be prosecuted in connection with an investigation into the awarding of police vehicle contracts.
“The decision was taken following a careful consideration of a large and complex file submitted to the PPS by the PSNI. The offences under investigation included bribery and misconduct in public office.
“It has been concluded that the test for prosecution is not met as the available evidence does not provide a reasonable prospect of a conviction.”
After he was released following questioning Mr McCausland strenuously denied wrongdoing and stressed his determination to prove his innocence.
The PPS received files on nine individuals in the investigation and decided not to prosecute any of those reported.
The eight who received notification of a decision on Tuesday are a mixture of police employees, former and current officers and civilians.