The corruption investigation that led to this round of convictions began in 2005, as an investigation into drug moneylaundering. Roca reportedly claimed to control the town after Gil's death. At the height of his wealth he was one of the richest men in Andalucia, having accumulated several hotels, ranches with more than 103 thoroughbred horses and fighting bulls, a private jet, a helicopter, 14 vintage cars, 5 kilos of jewellery and a 275 piece art collection including Miro paintings. However, although Marbella's population had boomed to approximately 160,000 residents during the previous fifteen years, neither additional schools nor health centres were built; the city's infrastructure remained virtually unchanged since 1991. Although the city expanded its workforce from 400 employees in 1991 to 3,200 in 2006, under the GIL administrations Marbella paid neither social security contributions nor taxes for its employees. The town's debt now exceeds over €200 million and precludes necessary infrastructure improvements. Hundreds of the poorly built apartments and homes, many sold to expatriate British and Irish retirees, face demolition as hazardous. Investigating magistrate Miguel Angel Torres Segura, who led the investigations through 2007, was promoted to the criminal court in Granada.