A paediatrician who accused the husband of cleared solicitor Sally Clark of murdering their two sons presented a theory as fact, a doctor has said.
Mr Clark was accused of killing his sons following a TV documentary
Professor Tim David said Professor David Southall had used his "uninformed" theory on the case and converted it into fact and accusation.
He told the General Medical Council in Manchester the senior paediatrician had relied on a television programme.
Professor Southall denies a charge of serious professional misconduct.
Prof David said the doctor had used information from a TV programme in a country where the media often portrayed information in an "inaccurate or very misleading way".
Prof Southall admits accusing Steve Clark of killing his sons, Christopher and Harry, after watching the Channel 4 documentary, Dispatches, about the case.
He contacted police after seeing Mr Clark interviewed on TV while his wife was in prison.
Giving evidence on Tuesday, Mr Clark said he thought it was "a sick joke" when the senior doctor accused him of murdering their sons.
Sally Clark was convicted in 1999 of murdering her two sons Christopher and Harry.
Her conviction was quashed when new medical evidence showing the babies died of natural causes was accepted by a second appeal hearing in January, 2003.
Professor Southall faces being struck off if he is found guilty of professional misconduct.