New Clues in Search for Madeleine McCann

Seven years after disappearance, police say they are searching for a man who allegedly sexually assaulted five other girls in the area.
3:00 | 03/20/14

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Transcript for New Clues in Search for Madeleine McCann
possible breakthrough in another one. Now to what could be the most significant lead yet in the mystery of Madeleine Mccann. The 3-year-old british girl who disappeared on a family vacation in Portugal seven years ago. Investigators running down brand-new clues about a possible suspect and lama Hasan has the latest. Reporter: While british detectives are now investigating a brand-new line of inquiry. They're on the hunt for a man who they believe is a local to this area and who was responsible for a series of break-ins and who pretoriaed on young girls. This morning, a disturbing possible lead nearly seven years after 3-year-old Madeleine Mccann vanished while vacationing with her family in Portugal. Police say they are now searching for a man they believe broke into buildings in the same area of Portugal in the years before and after Maddie's disappearance. On 12 separate occasions. Section wally assaulted five other young, white, british girls. We know this man has got this very, very unhealthy interest and these children are on holiday, I'm sure the public will understand it. There is significant features there. Reporter: Police say the assaults took place at resorts within 30 miles of each other and the man would sneak in during the early morning hours. Witnesses describe him as tan with dark hair and a pot belly who spoke English in a calm but slurred voice and on more than one occasion wearing a long sleeve burgundy shirt with a white circle. Police in Portugal say they've known about nine of the assaults but had to scatter them feeling they were spread over too wide an area and hasn't been attempts made at abductions. British authorities now say they first made the possible connection to Mccann when three victims' families came forward. Following this televised recreation of the Mccann crime five months ago. For her parents who were away at dinner when she vanished any new lead is promising. Every time a new appeal like today is made with new information coming forward so long after she went missing they feel that's progress. Reporter: Scotland yard detectives are still investigating other leads and trying to solve the mystery behind what happened to little Madeleine Mccann in the vacation apartment behind me. But making those recent links between what happened in those incidences here in Portugal and trying to identify this man could potentially be a significant break in this case. George and robin, back to you.

This transcript has been automatically generated and may not be 100% accurate.

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