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Open Image ModalUndated handout photo issued by Metropolitan Police of Alice Gross, as the search for Alice is now a murder inquiry, a Metropolitan Police commander said after a body was found in the River Brent, West London. (credit:Metropolitan Police/PA Wire)
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Open Image ModalUndated handout file photo issued by the Metropolitan Police of Arnis Zalkalns. The hunt goes on for missing schoolgirl Alice Gross after police completed a search at a second property linked to the prime suspect in her disappearance. (credit:Metropolitan Police/PA Wire)
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Open Image ModalFile photo dated 07/09/14 of police divers search the River Brent, near Hanwell, in west London, near to where missing schoolgirl Alice Gross, 14, was last seen, as the search for Alice Gross is now a murder inquiry, a Metropolitan Police commander said today after a body was found in the River Brent, West London. (credit:Dominic Lipinski/PA Wire)
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Open Image ModalA policeman looks at an Alice Gross missing poster on the towpath by the River Brent in Hanwell, west London, after the Alice Gross investigation became a murder inquiry. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice on the towpath by the River Brent in Hanwell, west London, after the Alice Gross investigation became a murder inquiry. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice on the towpath by the River Brent in Hanwell, west London, after the Alice Gross investigation became a murder inquiry. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice in Green Lane, Hanwell, west London, after the Alice Gross investigation became a murder inquiry. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice on the towpath by the River Brent in Hanwell, west London, after the Alice Gross investigation became a murder inquiry. (credit:Steve Parsons/PA Wire)
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Open Image ModalUndated handout photo issued bny Metropolitan Police of 14-year-old girl Alice Gross, from Hanwell west London. Police hunting for the missing schoolgirl have arrested a man on suspicion of murder, Scotland Yard said tonight. (credit:Metropolitan Police/PA Wire)
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Open Image ModalMetropolitan Police and a Dyfed Powys Police dog unit search a lake in Osterley Park, west London for missing Alice Gross. (credit:Steve Parsons/PA Wire)
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Open Image ModalSpecialists from the London Fire Brigade Urban Search and Rescue team clear the bank of the river Brent in Hanwell, west London searching for missing Alice Gross. (credit:Steve Parsons/PA Wire)
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Open Image ModalSpecialists from the London Fire Brigade Urban Search and Rescue team clear the bank of the river Brent in Hanwell, west London searching for missing Alice Gross. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice search outside the home of Latvian builder Arnis Zalkalns, 41, in Castlebar Road in Ealing Broadway, as detectives have revealed that the Latvian builder they are searching for in connection with the disappearance of schoolgirl Alice Gross is a convicted murderer. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice search outside the home of Latvian builder Arnis Zalkalns, 41, in Castlebar Road in Ealing Broadway, as detectives have revealed that the Latvian builder they are searching for in connection with the disappearance of schoolgirl Alice Gross is a convicted murderer. (credit:Steve Parsons/PA Wire)
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Open Image ModalPolice search outside the home of Latvian builder Arnis Zalkalns, 41, in Castlebar Road in Ealing Broadway, as detectives have revealed that the Latvian builder they are searching for in connection with the disappearance of schoolgirl Alice Gross is a convicted murderer. (credit:Steve Parsons/PA Wire)
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Open Image ModalHorse mounted police search a section of wasteland between the river Brent and Elthorne Park near to Trumpers Way, Hanwell for missing teenager Alice Gross as detectives investigating the disappearance have received 150 phone calls following a reconstruction of her last known movements. (credit:John Stillwell/PA Wire)
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Open Image ModalHorse mounted police search a section of wasteland between the river Brent and Elthorne Park near to Trumpers Way, Hanwell for missing teenager Alice Gross as detectives investigating the disappearance have received 150 phone calls following a reconstruction of her last known movements. (credit:John Stillwell/PA Wire)
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Open Image ModalSpecialists from the London Fire Brigade Urban Search and Rescue team clear the bank of the river Brent in Hanwell, west London searching for missing Alice Gross. (credit:Steve Parsons/PA Wire)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Jose Gross and Rosalind Hodgkiss, the parents of missing teenager Alice Gross hold a picture of their daughter at their home in Hanwell on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28, is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Dominic Lipinski - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Chloe, a 17-year-old police cadet walks along the towpath after walking under the Trumpers Way Bridge as she reconstructs the last known movements of missing schoolgirl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28 is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by John Stillwell - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Chloe, a 17-year-old police cadet walks across the bridge at the Brentford Locks as she reconstructs the last known movements of missing schoolgirl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28 is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by John Stillwell - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Chloe, a 17-year-old police cadet walks across the bridge at the Brentford Locks as she reconstructs the last known movements of missing schoolgirl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28 is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by John Stillwell - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Chloe, a 17-year-old police cadet walks besides the Canal at the Brentford Locks system as she reconstructs the last known movements of missing schoolgirl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28 is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by John Stillwell - WPA Pool/Getty Images) (credit:WPA Pool via Getty Images)
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Open Image ModalHandout CCTV images issued by Metropolitan Police of cyclists detectives would like to speak to who were seen close to where missing schoolgirl Alice Gross was last seen. The footage shows cyclists on the towpath arriving just before the 14 year old walks past along the Grand Union Canal at 1623 on Thursday August 28. (credit:Metropolitan Police/PA Wire)
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Open Image ModalHandout CCTV images issued by Metropolitan Police of the rucksack belonging to missing schoolgirl Alice Gross that was found on the towpath by the Grand Union Canal on Thursday August 28. (credit:Metropolitan Police/PA Wire)
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Open Image ModalHouse number pixelated by the PA picture desk The family home of missing 14-year-old girl Alice Gross, from Hanwell west London. (credit:Nick Ansell/PA Wire)
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Open Image ModalHouse number pixelated by the PA picture desk The family home of missing 14-year-old girl Alice Gross, from Hanwell west London. (credit:Nick Ansell/PA Wire)
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Open Image ModalPolice speak to members of the public as they search the Hanwell locks for missing 14-year-old girl Alice Gross, from Hanwell west London, who was last seen walking along a towpath in west London on August 28. (credit:Nick Ansell/PA Wire)
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Open Image ModalPolice use a boat to search the Hanwell locks for missing 14-year-old girl Alice Gross, from Hanwell west London, who was last seen walking along a towpath in west London on August 28. (credit:Nick Ansell/PA Wire)
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Open Image ModalThe family of missing 14-year-old girl Alice Gross, from Hanwell west London, father Jose Gross, 60, mother Rosalind Hodgkiss 50 and her sister Nina Gross, 19 with Alice's dog Peggy, at the family home in Hanwell as they renew appeals to help find her. (credit:Nick Ansell/PA Wire)
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Open Image ModalThe family of missing 14-year-old girl Alice Gross, from Hanwell west London, father Jose Gross, 60, mother Rosalind Hodgkiss 50 and her sister Nina Gross, 19, at the family home in Hanwell as they renew appeals to help find her. (credit:Nick Ansell/PA Wire)
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Open Image ModalRosalind Hodgkiss 50, the mother of missing 14-year-old girl Alice Gross, from Hanwell west London, speaks to the media at the family home in Hanwell as she renews appeals to help find her. (credit:Nick Ansell/PA Wire)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Police divers search the river Brent for clues in the hunt for missing school girl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28, is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Police divers hold up an item as they search the river Brent for clues in the hunt for missing school girl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28, is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: A tree and fence are covered in yellow ribbons as the search for missing school girl Alice Gross continues on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28. is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: Police officers search the river Brent for clues in the hunt for schoolgirl Alice Gross on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28, is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 23: A missing poster is placed in an area close to where schoolgirl Alice Gross was last seen on September 23, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28 is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focussed on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Rob Stothard/Getty Images) (credit:Rob Stothard via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 25: A poster of missing schoolgirl Alice Gross hangs on a bridge over The Grand Union Canal at the location of her last sighting, on September 25, 2014 in London, England. The hunt for Alice Gross from Hanwell, who went missing on August 28, is now being described as the largest police search operation since the 7/7 bombings of 2005. The police inquiry is now focused on a key suspect, Arnis Zalkalns, a Latvian builder, who was seen in the vicinity of Alice's last sighting. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 08: A police diver searches a stretch of the Grand Union Canal looking for missing schoolgirl Alice Gross on September 8, 2014 in London, England. Fourteen-year-old Alice Gross, from Hanwell in London, was last seen near the canal on August 28, 2014. Police have been granted more time to question a 25-year-old man arrested on September 6, 2014, whilst a 51-year-old man who was arrested yesterday remains in custody. (Photo by Oli Scarff/Getty Images) (credit:Oli Scarff via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 08: A police diver enters the Grand Union Canal to search for missing schoolgirl Alice Gross on September 8, 2014 in London, England. Fourteen-year-old Alice Gross, from Hanwell in London, was last seen near the canal on August 28, 2014. Police have been granted more time to question a 25-year-old man arrested on September 6, 2014, whilst a 51-year-old man who was arrested yesterday remains in custody. (Photo by Oli Scarff/Getty Images) (credit:Oli Scarff via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 08: A police diver searches a stretch of the Grand Union Canal looking for missing schoolgirl Alice Gross on September 8, 2014 in London, England. Fourteen-year-old Alice Gross, from Hanwell in London, was last seen near the canal on August 28, 2014. Police have been granted more time to question a 25-year-old man arrested on September 6, 2014, whilst a 51-year-old man who was arrested yesterday remains in custody. (Photo by Oli Scarff/Getty Images) (credit:Oli Scarff via Getty Images)
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Open Image ModalMaps sightings of missing teenager Alice Gross in west London. Editable versions of this graphic are available via PA Graphics or your account manager (credit:PA Graphics/PA Graphics)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 08: Police search teams investigate a stretch of the Grand Union Canal with dogs looking for missing schoolgirl Alice Gross on September 8, 2014 in London, England. Fourteen-year-old Alice Gross, from Hanwell in London, was last seen near the canal on August 28, 2014. Police have been granted more time to question a 25-year-old man arrested on September 6, 2014, whilst a 51-year-old man who was arrested yesterday remains in custody. (Photo by Oli Scarff/Getty Images) (credit:Oli Scarff via Getty Images)
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Open Image ModalLONDON, ENGLAND - SEPTEMBER 08: A police diver searches a stretch of the Grand Union Canal looking for missing schoolgirl Alice Gross on September 8, 2014 in London, England. Fourteen-year-old Alice Gross, from Hanwell in London, was last seen near the canal on August 28, 2014. Police have been granted more time to question a 25-year-old man arrested on September 6, 2014, whilst a 51-year-old man who was arrested yesterday remains in custody. (Photo by Oli Scarff/Getty Images) (credit:Oli Scarff via Getty Images)