A combo shows file photos of Karima El Mahroug of Morocco posing during a photocall at the Karma disco in Milan November 14, 2010 and Italy's former Prime Minister Silvio Berlusconi waving as he arrives for a meeting of the European People's Party in Brussels June 28, 2012.

The star witness in the sex with an underage prostitute trial of Silvio Berlusconi will not testify.

Ben Wedeman reports.