Mafia boss Matteo Messina Denaro arrested after 30 years on the run

Professor John Dickie (UCL School of European Languages, Culture & Society) describes Sicilian Mafia boss, Matteo Messina Denaro, as "symbolically significant" and explains why it it took the Italian authorities such a long time to arrest him.

Watch: Channel 4 News (from 2 mins, 2 secs), More: Irish Times