July 4, but Van der Sloot was detained for an additional 60 days. Continued search, rearrests and releases On July 4, the Royal Netherlands Air Force deployed three F-16 aircraft equipped with infrared sensors to aid in the search, but the results came up empty. In March 2006 it was reported that satellite photos were being compared with photographs taken more recently (presumably from the F-16s) in an attempt to find unexpected shifts of ground that might be Holloway's grave. After a local gardener came forward with information, a small pond near the Aruba Racquet Club close to the Marriott Hotel beach was partly drained between July 27 and 30, 2005. According to Jug Twitty, the gardener claimed to have seen Van der Sloot attempting to hide his face as he drove into the Racquet Club with the Kalpoe brothers on the very early morning of May 30 between 2:30 a.m. and 3:00 a.m. Nancy Grace described the gardener as "the man whose testimony cracks the case wide open". Another person, "the jogger", claimed to have seen men burying a blonde-haired woman in a landfill during the afternoon of May 30. The police had searched the landfill in the days following Holloway's disappearance. After the jogger's statements, the landfill was searched three more times; the FBI used cadaver dogs to assist in the recovery operation. The searches were fruitless. Holloway's family initially offered $175,000 and donors offered $50,000 for her safe return. Two months after her disappearance, the reward was increased from $200,000 to $1,000,000, with a $100,000 reward for information leading to the location of her remains. In August 2005, the reward for information leading to Natalee's corpse was increased from $100,000 to $250,000. The FBI announced that Aruban authorities had provided its agency with documents, suspect interviews, and other evidence. Investigators found a piece of duct tape with strands of blond hair attached to it; the samples were tested at a Dutch lab. A group from the Aruban police and prosecutor's office then traveled to the FBI central laboratory at Quantico, Virginia, to consult with American investigators. The hair samples were then tested a second time. The FBI announced that the hair samples did not belong to Holloway. The Kalpoe brothers were rearrested on August 26 along with another new suspect, 21-year-old Freddy Arambatzis. Arambatzis' lawyer said that his client was suspected of taking photographs of an underage