Madeleine McCann search efforts end with no breakthrough after 72 hours.

The three-day search for missing British toddler Madeleine McCann in the Barragem do Arade reservoir in Portugal is reportedly ending after police received a "very credible" tip that suspect Christian Brueckner visited there shortly after the child was last seen. Brueckner, a German sex offender, is a prime suspect in the case. The search involved heavy machinery, sniffer dogs, and divers. Madeleine vanished from her family's vacation apartment in Praia da Luz in May 2007 when she was just 3 years old. Her parents, Gerry and Kate McCann, left her sleeping alone in the flat while they dined out nearby.