A couple arrested on suspicion of the murder of Baby John almost 40 years ago have not returned home since their release from garda custody.
The pair, a man in his 60s and a woman in her 50s, from Co Kerry, were detained last week on suspicion of the murder of the newborn whose body was found with 28 stab wounds.
They were subsequently released without charge with a file being prepared for the Director of Public Prosecutions.