A man who lost his mother in the Glasgow bin lorry crash has criticised the "imprudent" comments of Scotland's senior law officer on a documentary about the tragedy.

Adam Russell, who appeared in the BBC Scotland documentary Lies, Laws and the Bin Lorry Tragedy, broadcast on November 3, said he was "stunned" to hear Lord Advocate Frank Mulholland denounce the programme.

In a statement given to the BBC, Mr Russell highlighted the perceived poor treatment he and the other relatives of the victims had received, particularly with the altered version of events given to them by Crown official David Green surrounding the health of Harry Clarke, the driver of the bin lorry.

In a leaked memo, Mr Mullholland was heavily critical of the BBC for broadcasting "inaccuracies and innuendo" over the Crown Office's handling of the crash, describing the programme as a "sensationalist documentary".

Mr Russell's statement said: "My family have been poorly treated by the Crown Office and Procurator Fiscal Service from beginning to end and their continued defence of an indefensible position only undermines public confidence in them."

Responding specifically to the Lord Advocate's comments, Mr Russell said: "Having read the leaked memo on Twitter last week regarding Mr Mulholland's and Catherine Dyer's response to a BBC documentary which I was a part of, I once again feel the need to speak out.

"I am frustrated that I have to do this as I feel the imprudent comments of Mr Mulholland are a distraction from the impending determination of the fatal accident inquiry."

Mr Russell added: "Given Mr Mulholland was aware that David Green did not give us the same version of events that Mr Mulholland claims to have been aware of, I was stunned to see the uncritical support of David Green."

In its own statement, the BBC have defended "the integrity and accuracy of its journalism" in the documentary and rejected "the general, but non-specific, criticisms reported to be in the Crown Office internal note".