Reconstruction Of The Disappearance Of Alice Gross

LONDON, ENGLAND - SEPTEMBER 25: A police cadet reconstructs the last known movements of missing schoolgirl Alice Gross - here she walks under a bridge on the Grand Union Canal - 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)