Spanish police arrest ex-fraud chief after €20m found in walls of his house

Investigation into country's largest cocaine bust reveals cash in home of former head of anti-money laundering

Spain has arrested one of its top police officers after 20m (17m) was found hidden in the walls of his house, as part of an investigation into the country's largest-ever cocaine bust.

Oscar Sanchez Gil was until recently the head of the fraud and anti-money laundering division of Spain's national police force in Madrid.