In September 1992 he became a pentito and started to collaborate with the authorities.

Practical Peter collaborates with the new authorities in an effort to make the best of things.

In January 2008, he decided to collaborate with the Italian authorities.

Witness protection programs have persuaded more than 200 Mafiosi to collaborate with the authorities.

"Don't forget that if people begin to collaborate with the authorities, this is a real coup against the Mafia," he said.

Of the businessmen named in the book, 20 agreed to collaborate with the authorities and 30, fearing retribution, refused.

La Barbera started to collaborate with the authorities in November 1993.

Paz Mejía was eventually freed for collaborating with the authorities.

A month later her brother's widow went to the police and talked - deciding to collaborate with the judicial authorities.