Dessie O'Hare, the INLA man known as the Border Fox, has been granted extended temporary release by the Irish Republic's prison service.
O'Hare was once the Irish Republic's most wanted man
O'Hare, originally from County Armagh, was serving a 40-year sentence for kidnapping and mutilating the Dublin dentist, John O'Grady, in 1988.
He took a High Court action and was declared a qualifying prisoner under the terms of the Good Friday Agreement.
He has previously been released for short periods.
O'Hare was the most wanted man in the Republic after he kidnapped and mutilated Mr O'Grady
He chopped off bits of two of the dentist's fingers with a chisel, because a ransom demand had not been paid.
Irish police managed to free Mr O'Grady, but O'Hare escaped before eventually being recaptured after a shoot-out in County Kilkenny.
O'Hare was sent to the high security Portlaoise prison but was later moved to the more relaxed Castlerea jail.