From the BBC:
Sinn Féin leader Gerry Adams has been arrested by Northern Ireland police in connection with the 1972 murder of Jean McConville.
Mrs McConville, a 37-year-old widow and mother of 10, was abducted from her flat in the Divis area of west Belfast and shot by the IRA.
Her body was recovered from a beach in County Louth in 2003.
Police said a 65-year-old man presented himself to Antrim police station on Wednesday evening and was arrested.
In a statement, Sinn Féin said: “Last month Gerry Adams said he was available to meet the PSNI about the Jean McConville case. That meeting is taking place this evening.”