Published Saturday, 03 May 2014
Tommy Crossan died after he was shot last month. (© Pacemaker)
The 24-year-old was detained on Friday in west Belfast in connection with the shooting.
Mr Crossan, a 43-year-old former senior figure in the Continuity IRA, was shot dead as he sat in an office in the Peter Pan complex on the Springfield Road in west Belfast on Friday 18 April.
He was hit a number of times in the upper body and was pronounced dead at the scene.
Police recently returned to the scene of the murder and made a fresh appeal for information centred on an old style red BMW coupe, registration number OEZ 9177, which was found partially burned out in the Beechmount Grove area a short time after Mr Crossan was shot.
Anyone with information has been asked to come forward.
© UTV News