Wandsworth prison in south London in a 2010 photo. Neil Moore, a 28-year-old convicted fraudster, walked out of the prison earlier this month by showing guards a bail letter he'd forged. Andrew Winning /Reuters/Landov hide caption

itoggle caption Andrew Winning /Reuters/Landov

A German police investigator carries a box after searching an apartment believed to belong to the crashed Germanwings flight 4U 9524 co-pilot Andreas Lubitz in Duesseldorf, on Thursday. Wolfgang Rattay/Reuters/Landov hide caption

itoggle caption Wolfgang Rattay/Reuters/Landov

A stone memorial, surrounded by flowers, has been placed near the site in the French Alps where a Germanwings passenger jet crashed on Tuesday (March 24, 2015). Investigators believe the jet's co-pilot brought it down deliberately. Jeff Pachoud /AFP/Getty Images hide caption

itoggle caption Jeff Pachoud /AFP/Getty Images

Police officers carry boxes outside a house in Montabaur, Germany, on Thursday in connection with the investigation into the Germanwings A320 crash. Fredrik von Erichsen /EPA /Landov hide caption

itoggle caption Fredrik von Erichsen /EPA /Landov