When Matteo Messina Denaro died in 2023, many of his secrets died with him. That began to change with a tip about a wealthy Sicilian woman’s significant assets in a tiny European principality.

© Carabinieri, via Associated Press

The money has become a sticking point in talks, with Iran insisting that meaningful negotiations cannot begin without the funds’ release.

© Arash Khamooshi/Polaris for The New York Times