The suspect, understood to be a member of a well-known family, was initially interviewed by Gardaí shortly after her disappearance.
Investigators initiated a search of land on the Kildare/Wicklow border for Jo Jo Dullard after re-examining a witness statement that suggested “rubbish” may have been buried in an open drain on the property.
According to the Irish Independent, one source said a witness who was involved in drainage work on the property was allegedly asked to bury rubbish in an open ditch before it was filled in.
A second source said the search was carried out as the result of a “definite hypothesis” based on a reanalysis of statements taken from witnesses at the time she disappeared.
The search is now in its third week.
On November 11, Gardaí initiated a renewed search for Jo Jo Dullard’s remains, accompanied by the arrest of a man in his 50s for questioning.
Although the suspect was later released without charge, it is understood that his detention revealed that he had been receiving mental health care, according to the paper.
The development has opened a new line of inquiry, which may result in investigators applying to the courts.
The suspect, understood to be a member of a well-known family, was initially interviewed by Gardaí shortly after her disappearance.
Despite years of investigation, her case remains unsolved, with the current search marking a significant step in the pursuit of answers.

Kfm Obituary Notices
Council Acquired Seven Derelict Properties Through Compulsory Purchase Orders Last Year
Works For A New Bus Stop In Maddenstown Set To Take Place In May
Parents Association Call For Urgent Action Over "Unsafe" Maynooth School Car Park
Minister Martin Heydon Calls On EU To Be Flexible On Levies For Fertiliser
Gardai Have Arrested 3 People In Relation To Man Last Seen Alive In Monasterervin In 2019
Naas Clinic Among Highest Earners From Medical Cert Scheme
Naas Residents Reminded Of Planned Water Outage To Take Place Tonight