Together with the Ulster Defence Association, the UFF is the largest of the loyalist paramilitary groups in Northern Ireland.
Mr McMichael's party is linked to the paramilitary group, the Ulster Defence Association.
Her murder was carried out by the splinter loyalist group, the Red Hand Defenders, which is a cover name for the Ulster Defence Association and Loyalist Volunteer Force.
Mr Finucane's killing was one of the most controversial of the 30 years of the Troubles in Northern Ireland, mainly because of the allegations of collusion between the Ulster Defence Association and members of the security forces.
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The chief constable has said he believes loyalist paramilitaries shot Mr Moore and Mr Scullion and that speculation that the Ulster Defence Association - which is meant to be on ceasefire - may have been involved was "a distinct possibility".
One of the murder charges involved the killing of the loyalist Ulster Defence Association leader, Tommy English, in October 2000.
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Mr Slane, a 27-year-old father of three, was shot dead by the loyalist Ulster Defence Association (UDA) at his home at Waterville Street, west Belfast, in September 1988.
Pastor Jack McKee, who has tried to mediate in the feud between the Ulster Volunteer Force and Ulster Defence Association on the Shankill Road, said there was growing concern over the killings since the weekend in north Belfast.
Mr Finucane, a high-profile Catholic solicitor, was shot dead by the loyalist paramilitary Ulster Defence Association in front of his family at his Belfast home in 1989.
The shooting was thought to have been in reprisal for the murder of 21-year-old David Greer, a member of the loyalist paramilitary Ulster Defence Association (UDA) on 28 October.
Mr O'Hagan's killing was claimed by the Red Hand Defenders, a cover name used by both the Loyalist Volunteer Force (LVF) and Ulster Defence Association.
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