Pc Harwood left the Metropolitan Police a decade ago amid controversy over an alleged off-duty road rage incident, then got a job with Surrey Police, where he was accused of using excessive force.
He could now face disciplinary charges over the death of Mr Tomlinson, and could also be the subject of an internal investigation by the Met into how he was allowed to rejoin the force despite having an unresolved disciplinary matter on his record.
The married 43 year-old had been due to face a misconduct hearing over the alleged road rage incident, understood to have happened in the late 1990s, but instead retired on medical grounds.
A few years later, the father of two rejoined the Met as a civilian computer worker before applying to Surrey Police for a job as a police constable in May 2003.
A spokesman for Surrey Police said: “He applied to become a Pc with us in 2003. Following our vetting procedure, liaising with the Met Police and passing a medical examination, he was accepted.
“He was full and frank about his history.
“Surrey Police had no concerns at the time and he followed the standard procedure for everybody.”
Pc Harwood spent a year and half working in Surrey before applying to be transferred back to the Met in the autumn of 2004. However, during his time at Surrey he faced a complaint about his alleged behaviour while on duty.
The force spokesman said: “There was a thorough internal investigation and the claim was subsequently found to be unsubstantiated and no further action was taken.”
Pc Harwood returned to the Met in November 2004, but it is unclear whether the force was aware of the previous misconduct procedure, or whether there had been a failure in its vetting process.
By the time of the G20 protests last year, Pc Harwood was working with the Met’s territorial support group (TSG), which provides an immediate response to spontaneous disorder anywhere in London.