Authorities pursue credible lead in renewed search for Madeleine McCann.

The ongoing search for evidence relating to Madeleine McCann at a remote reservoir in Portugal was reportedly prompted by information from a "very credible" informant. German and Portuguese authorities investigating suspect Christian Brueckner continue to examine the area around Arade Dam, which is about 45 minutes away from the Portuguese town Praia da Luz, from which three-year-old Maddie went missing in 2007. Any evidence found at the site could provide a crucial link to photographic proof which placed Breuckner close to the dam in 2007. Breuckner is currently in jail for the 2005 rape of a US pensioner in Praia da Luz.