The pathologist who wrongly diagnosed the cause of death of newspaper seller, Ian Tomlinson, during the 2009 G20 protests faces being struck off the medical register after investigators condemned his professional behaviour.
Dr Freddy Patel acted with "deficient professional performance" over his post-mortem investigation into the death of Mr Tomlinson, the Medical Practitioners Tribunal Service (MPTS) said, adding that the pathologist's fitness to practice is "impaired by reason of misconduct".
The MPTS will now decide whether Dr Patel should be struck off the medical register.
They found that Dr Patel had "brought the profession into disrepute" and that his integrity could not be relied upon.
He also breached one of the "fundamental tenets of the profession" through his dishonesty, the panel said.
The pathologist, who is currently suspended, concluded that newspaper seller Mr Tomlinson died from a heart attack but questions were raised when an American tourist came forward with a film recording of him being hit.
Further medical reports suggested that, in fact, he died from an injury to his liver that caused internal bleeding and then cardiac arrest.
Panel chair Rev Robert Lloyd-Richards said: "It is clearly in the interest of the general public that they should be able to have confidence in the coronial system and this confidence has been undermined by your failures in these cases.
"Having considered everything before it the panel has determined that your fitness to practise... is impaired by reason of misconduct and deficient professional performance in the case of Mr Tomlinson."