One of Italy's most notorious mafia bosses is in custody, after 30 years on the lam.
- Matteo Messino Denaro was arrested Monday in the Sicilian capital of Palermo.
- Denaro is believed to be the leader of organized crime group Cosa Nostra and was Italy's #1 most wanted fugitive.
- He's been in hiding since 1992, when he was convicted in the murder of two Italian prosecutors.
- Denaro's story was featured on an episode of the Netflix series World's Most Wanted.