and running 4 meters (13 ft) beneath the surface, was well-constructed: it was lined with wood and plastic and had its own lighting and air conditioning systems. Execution On the final weekend, the gang broke through 1.1 meters (3.6 ft) of steel-reinforced concrete to enter the bank vault. A considerable amount of time would be required to remove and transport the money due to the volume and weight of the amount that was taken. Investigation "They worked for several months", police said. "The gardening company was working since March. They had sophisticated equipment, including GPS, and experts in mathematics, engineering and excavation." Police located a pick-up truck branded with a Grama Sintética (Synthetic Turf) logo found at the rented property. Bolt cutters, a blow torch, an electric saw and other tools used to penetrate the concrete barrier were found both inside the vault and within the empty property. The property was covered in burnt lime to avoid fingerprints. Suspects The Brazilian Federal Police are investigating a possible connection between the burglars and car resellers in Fortaleza. On August 10, 2005, the Military Police of Minas Gerais arrested two men driving a car-carrying truck in Sete Lagoas, near Belo Horizonte, Minas Gerais. More than R$2.13 million was recovered in three pickup trucks being transported. Five men were arrested on September 28, 2005, with about R$5.22 million of the money and told the police they had helped dig the tunnel. Eighteen suspects remain at large. Prosecutors have said the group tried unsuccessfully to charter a small plane days before the robbery to escape and move the money out of the country. On October 20, 2005, the body of one of the alleged masterminds, Luis Fernando Ribeiro, 26, was found on an isolated road near Camanducaia, 200 miles (320 km) west of Rio de Janeiro. He had been shot seven times and had handcuff marks on his wrists. "It was definitely because of the robbery," according to a police official of Minas Gerais who identified himself only as Corporal Leonino. Ribeiro fled from Fortaleza to São Paulo after the robbery and was kidnapped on October 7, 2005. His family paid R$893,600 in ransom, but he was not freed. There were signs that police officers were involved in the kidnapping and killing, and three of them were arrested. On October 28, 2005, a person linked to a former security guard involved in the burglary