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Prior to Wednesday, Mahmoud, a 70-year-old pensioner, disappeared from his residence in Bullock Dacor.
Four days later, Mahmoud did not show up, and he told his son Amr, 51, that his father was absent. Mahmoud's absence from his home remained a mystery until the Giza Investigations moved into the house.
During the search of the house, traces of sand were found in the apartment and followed down to the son's bed, where there are traces of modern cement. An incident report was released and the prosecution was informed of the investigation.