The nonce was arrested in the village of Annalong area of Co Down on September 29 after the 12-day-old infant was sexually assaulted so badly it is in intensive care.
The attack is only thought to have lasted “a few seconds” but was enough to cause serious injuries to the individual.
A source said: “It was a few digs, just for a few seconds. Then there was some panic and staff moved in to sort it out.”
He has been moved to a secure unit at the prison hospital for fear he could be attacked again.