David Ervine was an Irish Unionist politician from Belfast and the leader of the Progressive Unionist Party . During his youth Ervine was a member of the Ulster Volunteer Force and was imprisoned for possessing bomb-making equipment. Whilst in jail he became convinced of the benefits of a more political approach for Ulster loyalism and became involved with the PUP. Wikipedia*
On the C-SPAN Networks:
David Ervine has one video in the C-SPAN Video Library; the first appearance was a 1998 Statement.