page_title: Murder of Marta del Castillo
section_title: Guadalquivir River search
hierarchical_section_title: Murder of Marta del Castillo / Investigation / Guadalquivir River search
caption_attribution_description: Español: El Guadalquivir desde la Torre del Oro.
context_page_description: Marta del Castillo Casanueva was a Spanish high school student who disappeared and was presumably murdered on January 24, 2009. Despite extensive searches and the conviction of Miguel Carcaño Delgado in 2011, her body has never been found. The case is popularly known in Spain as the Disappearance of Marta del Castillo or simply as the Marta del Castillo Case.
context_section_description: 218 officers of the Police's Special Operations Group, the Civil Guard's Underwater Specialist Groups, and the Military Emergencies Unit searched the Guadalquivir between Camas and the stuary at Sanlúcar de Barrameda, using 22 vessels, 3 jet skis, 2 helicopters, 13 scent hounds, and a sonar and specialized underwater body retrieval technology lent by the Dutch Police. A Gelves dock engineer also designed, built and volunteered a rake-like tool capable of removing mud from the bottom of the river.
  Three separate tests with pig carcasses weighing 50 kilograms were made. The bodies submerged several times, but in all three cases, they ended on the surface and stuck in a particular stretch of riverbank that was only 20 kilometers long. However, no trace of Del Castillo was found. Police worked with the hypothesis that the large volume of the Guadalquivir in January and the three weeks between the murder and Carcaño's confession had been enough to either wash the body out to sea before the search began or to entomb it in the bottom mud, which can be two meters thick in some areas.
  Also searched were over 40 wells, canals, sewage plants, and pipes. A "bloodstained cloth" found in an irrigation canal near Camas was revealed to be just painted red after testing.
caption: Bridges across the Guadalquivir River in Seville.
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