A retired detective inspector, who was part of the so-called Murder Squad which investigated the Kerry Babies case in 1984, has repeated his calls for the bodies of the two babies involved to be exhumed so that new DNA analysis can be carried out.

Gerry O'Carroll was part of a team of detectives sent from Dublin to investigate the Kerry Babies case under Superintendent John Courtney.

Writing four years ago on the 30th anniversary of the discovery of 'Baby John' at the White Strand near Cahersieveen on 14 April 1984, Mr O'Carroll said he was "convinced" that Joanne Hayes gave birth to twins, and that one of those babies was Baby John.

Ms Hayes gave birth to a baby whose body was found on the family farm at Abbeydorney, after the discovery of Baby John at White Strand.

She was later arrested by gardaí on the grounds that she had given birth to both babies and charged with murder.

Gardaí claimed that she had been pregnant by two different men – the superfecundation theory - which also explained the discrepancies in the babies’ blood types.

The murder charge was later dropped and a tribunal of inquiry was set up to investigate the garda handling of her case.

Advances in DNA profiling have confirmed that Ms Hayes was not the mother of Baby John and on Tuesday gardaí apologised to her for the stress and pain she was put through.

Taoiseach Leo Varadkar yesterday also apologised on behalf of the State to Ms Hayes for what she had suffered during the investigation.

However, in an interview with the Kerryman newspaper this week, conducted after the apology by gardaí to Ms Hayes, Mr O’Carroll repeated his calls for the bodies of both babies to be exhumed so that new DNA analysis can be carried out.

He told the Kerryman he believed this is necessary to, as he put it, conclusively put the matter to bed and also called for an outside agency such as Scotland Yard to be engaged to do that work.

Mr O'Carroll said he would accept the findings of that analysis and that investigation.