IPCC probe Cleveland Police officers over Bronson Tyres kidnap trial
The police watchdog has opened a third inquiry into Cleveland Police over claims that officers conspired to pervert the course of justice in 2004.
The Independent Police Complaints Commission (IPCC) inquiry relates to the trial of a man jailed for kidnap.
Bronson Tyers was jailed for 12 years in 2006 for the kidnap of Tony Pattison in Seaton Carew. The conviction was later overturned on appeal.
Cleveland force is already the subject of two other IPCC inquiries.
An IPCC spokesman said it was "managing an investigation into an allegation that Cleveland Police officers perverted the course of justice during a man's trial.
"This investigation is ongoing and is being conducted by officers from West Yorkshire Police under the direction and control of an IPCC investigator.
"It would be inappropriate for the IPCC to comment further at this stage."
A Cleveland Police spokesman said the current investigation was not connected to any other IPCC investigation and that no officers had been suspended.
The IPCC is already looking into claims of corruption and misconduct against the force's chief constable Sean Price, his deputy Derek Bonnard and former head of legal services, Caroline Llewellyn.
A separate IPCC investigation is ongoing into an allegation that Mr Price used undue influence to have an individual appointed to a position within the police force.