Convicted sex offender Liam Adams - brother of former Sinn Féin leader Gerry Adams - has died.
Liam Adams, 63, formerly of Bernagh Drive, west Belfast, was sentenced to 16 years in jail in 2013 for raping his daughter.
The abuse scandal put Gerry Adams, then Sinn Féin president, under intense public pressure and political scrutiny.
Liam Adams, a former IRA member, was found guilty of a series of sexual assaults on Áine Tyrell.
She waived her right to anonymity to speak out about the abuse in 2009.
On Monday, the Department of Justice said: "The Northern Ireland Prison Service can confirm the death in custody of a 63-year-old prisoner from Maghaberry Prison.
"The prisoner died on Monday morning...his next of kin have been informed.
"As is standard procedure, the PSNI and Prisoner Ombudsman have been informed."