Jimmy Devaney, aged 63, of Millbrooke Avenue, Monksland, Athlone, said nothing when faced with the charges during a three-minute-long special sitting of Athlone district court last night.
He has been remanded in custody to Cloverhill prison in Dublin for one week in relation to the murder of Ms Greene, who disappeared from her home 12 days ago.
Speaking during the court sitting, detective sargeant Eamon Curley confirmed Mr Devaney was arrested at his home shortly before 8am on Monday morning and charged with the murder at 5.25pm yesterday.
The accused made no reply to the charge, Judge David Anderson was told.
Despite his being in receipt of an army pension of around €€300 per week, Mr Delaney’s solicitor Tony McLynn applied for, and was granted, legal aid.
He informed the court his client would consent to the remand, but would be applying for High Court bail on Monday.
Marie Greene, who was single and the primary carer for her diabetic mother, left the family home at 9pm on Sunday, February 13, before disappearing.
Gardaí believe she was killed later that evening at Tully Cross, Moydrum, in Athlone. She was well known around the town, and regularly walked her dog Scooby for exercise.
Speaking to local press last week her tearful mother Winnie said: “She’s either held against her will, or dead in a ditch somewhere. Something’s wrong, somewhere”.
After an extensive investigation over the last 10 days led by Garda Superintendent Aidan Glacken, officers sealed off an area of bogland approximately two miles outside Athlone on the Mullingar road on Monday.
After the State pathologist and the Garda technical bureau visited the scene, they removed the body of the victim later that afternoon to the Regional Hospital in Tullamore where a postmortem was carried out.
It is understood Ms Greene’s family members were able to visibly identify her after the remains were moved to Midlands Regional Hospital in Mullingar.
During the postmortem, Dr Cassidy took DNA samples and forensic evidence, which will be subject to further examination. She also established cause of death and likely time of death.
DNA samples have already been taken from Ms Greene’s family, including from her mother, Winnie. These will be used to confirm identification and assist in the investigation.
The bureau has already taken samples, DNA and forensic, from a house in Monksland, in the western part of the town.
Gardaí received good leads after they appealed last Tuesday week for information relating to her disappearance.