Ray Mallon: The pioneer of zero tolerance in the region, remains suspended after three years, despite being cleared of any criminal wrongdoing.

Barry Shaw: The Cleveland Chief Constable is under investigation following claims he leaked a confidential document to a newspaper which was critical of Mr Mallon's policing.

Robert Turnbull: The man who suspended Mr Mallon. He resigned as deputy chief constable in February 1999, with a golden handshake worth £180,000 and a £50,000-a-year pension. Took a job as deputy commissioner of the Royal Turks and Caicos Islands.

Andrew Timpson: The former chief constable of Warwickshire, he was asked to head the Operation Lancet inquiry. After being investigated by his own force, he went on sick leave and finally retired.

Richard Brunstrom: Left his job as Cleveland assistant chief constable to take up the same post with North Wales Police.

Dave Earnshaw: Handed in his notice for early retirement as an inquiry was announced into allegations against him, for which no action was taken. Worked as a civilian consultant on the Operation Teak inquiry.

Kevin Pitt: The chief superintendent is now district commander at Stockton. He was criticised by a judge following the collapse of a trial involving detectives Russ Daglish and Brendon Whitehead.

Ashok Kumar: The Middlesbrough South and East Cleveland MP has fought for the reinstatement of Mr Mallon.

Joanne Malone: The police whistle blower who claimed Mr Shaw is implicated in a dirty tricks campaign against Mr Mallon.

Jayne Thwaites: The Hartlepool civilian police worker alleged that Mr Shaw was behind false rumours that she had an affair with Mr Mallon.

Lloyd Clarke: Deputy chief constable of West Yorkshire Police took over the Lancet investigation from Mr Timpson.

Russ Daglish: Mr Mallon's former right-hand man, he was due to stand trial accused of stealing a boiler, but the case against him collapsed at Hull Crown Court.

Brendon Whitehead: The detective was also accused with the alleged theft of the boiler.