Sinn Fein leader Gerry Adams said he supports the PSNI, though he criticised the timing and duration of his arrest, and said elements within the police, "the old guard" who are against change, "cannot win".
I want to make it clear I support the PSNI. I will continue to work with others to make it a genuinely civic service. The old guard, which is against change, (....) they cannot win.
The dark side of the British system cannot be allowed to deny anyone, Catholic, Protestant or dissenter, our entitlement to a rights-based, citizen-centred society, as set out in the Good Friday Agreement.
I am an Irish republican, I want to live in a peaceful Ireland, based on equality. I have never dissociated myself from the IRA and I never will. But I am glad that I and others have created a peaceful and democratic way forward for everyone.
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".