Northern Ireland's First Minister Peter Robinson has said it would have been "political policing" for the Police Service of Northern Ireland not to question anybody deemed involved with the 1972 murder of Belfast mother-of-10 Jean McConville.
He said: "When she returned home, her young children had barely time to dress the wounds, before 12 IRA thugs ...dragged her out with her children screaming, took her to a beach in County Louth, the constituency of Mr Adams, and tied her hands behind her back, and shot her in the back of the head."
He questioned accusations of "political policing" over officers investigating claims and evidence related to such a "barbaric killing".
"I would suggest to you it would be political policing if the PSNI had not questioned those that were deemed to have been involved in any way," he added.
Adams attacks reasons for his detention and denies McConville murder
It is claimed IRA volunteers described what happened the night Jean McConville was murdered to Boston College's "Belfast Project".