I'm curious to hear his explanation (head of anti-fraud department with unusual approach to home insulation)

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.

Óscar Sánchez Gil was until recently the head of the fraud and anti-money laundering division of Spain’s national police force in Madrid.

Officers arrested him last week along with 15 other people, including his romantic partner, who is also a police officer in the Madrid region, a police source said without naming her.

During the raid, police found the €20m, in cash, hidden in the walls and ceilings of the couple’s home in Alcalá de Henares, a town of about 195,000 inhabitants located 18 miles (30km) east of the Spanish capital.

Officers also found €1m in his office, hidden in two locked cupboards, in bills of €50-500, according to the police source.

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