Complex sentence: Weir had been arrested at work in Magherafelt shortly before Christmas 1979 for his part in the murder of Strathern, and subsequently confessed his involvement at Castlereagh Holding Centre following interrogation.
Split into simpler sentences: Weir had been arrested at work in Magherafelt shortly before Christmas 1979 for his part in the murder of Strathearn. He later confessed his involvement at Castlereagh Holding Centre following interrogation.