Stakeknife: IRA's double agent to be quizzed about 24 murders

The IRA's most senior double agent is to be investigated about the murder of at least 24 people.

The army agent, who was given the codename Stakeknife, has been named by the BBC as west Belfast man Fred Scappaticci. He has denied he was an agent.

BBC News NI's Home Affairs Correspondent Vincent Kearney reports.